{"id":192562,"date":"2021-07-02T17:49:09","date_gmt":"2021-07-02T15:49:09","guid":{"rendered":"https:\/\/www.cined.com\/sony-a1-lab-test-rolling-shutter-dynamic-range-and-latitude\/"},"modified":"2021-07-02T19:53:02","modified_gmt":"2021-07-02T17:53:02","slug":"sony-a1-lab-test-rolling-shutter-dynamic-range-and-latitude","status":"publish","type":"post","link":"https:\/\/staging.cined.dev\/es\/sony-a1-lab-test-rolling-shutter-dynamic-range-and-latitude\/","title":{"rendered":"Prueba de laboratorio de la Sony A1 &#8211; Rolling shutter, rango din\u00e1mico y latitud"},"content":{"rendered":"\n<p><strong>Recientemente pusimos a prueba la nueva c\u00e1mara insignia de Sony de la serie Alpha, la A1, a trav\u00e9s de nuestros procedimientos de laboratorio. \u00bfTienes curiosidad por saber qu\u00e9 tan buena es? Entonces sigue leyendo\u2026<\/strong><\/p><192562-inline-buylinks\/>\n\n\n\n<p>Despu\u00e9s de probar la Sony a7S III hace un tiempo atr\u00e1s, fue agradable tener una c\u00e1mara Sony Alpha nuevamente en mis manos. Realmente me gusta el tama\u00f1o y el peso de la A1, que son bastante peque\u00f1os en comparaci\u00f3n con otras c\u00e1maras full-frame como la Panasonic S1 o S1H, por ejemplo.<\/p>\n\n\n\n<p>La Sony A1 ofrece caracter\u00edsticas espectaculares (puedes leer m\u00e1s sobre ellas <a href=\"https:\/\/www.cined.com\/es\/sony-alpha-1-full-frame-camera-announced-up-to-8k30-and-s-cinetone\/\">aqu\u00ed<\/a>), como full-frame 8K grabado internamente hasta 30 fps o 4K 120fps, todo en 10 bits con codificaci\u00f3n LOG en S-Log2 y S-Log3, y una posibilidad adicional de grabaci\u00f3n ProRes RAW con el grabador externo ATOMOS NINJA 5 (consulta nuestro art\u00edculo aqu\u00ed). Adem\u00e1s, mi querido amigo y colega Johnnie hizo una rese\u00f1a de la c\u00e1mara que incluye uno de sus mini-documentales especiales con la \u201cimpronta Johnnie\u201d <a href=\"https:\/\/www.cined.com\/es\/sony-a1-footage-music-fire-and-me-mini-documentary-and-hands-on-review\/\">aqu\u00ed<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Utilizando la tarjeta NVIDIA GeForce RTX3090 con los archivos Sony 8K H265<\/strong><\/h2>\n\n\n\n<p>Gracias a NVIDIA, tenemos una tarjeta RTX3090 en pr\u00e9stamo en nuestra oficina, y lo creas o no, usar los archivos 8K H265 en una l\u00ednea de tiempo de 8K (7680\u00d74320) en DaVinci Resolve (17.2) fue sencillo y bastante fluido. El uso de memoria de la GPU fue de alrededor de 10GB, con la GPU funcionando en torno al 30% de carga. Al agregar la reducci\u00f3n de ruido (3 cuadros temporales y espaciales), l\u00f3gicamente esto provoc\u00f3 una ca\u00edda masiva de la reproducci\u00f3n, pero igualmente obtuvimos alrededor de 8 fps con la configuraci\u00f3n que podr\u00e1n ver m\u00e1s abajo en este art\u00edculo (5 paradas por debajo con reducci\u00f3n de ruido), donde la carga de la GPU rondaba el 90% y la memoria alcanz\u00f3 los 16GB. Esto es realmente asombroso, ya que la mayor\u00eda de las tarjetas gr\u00e1ficas tienen inconvenientes para reproducir archivos 4K H265 en una l\u00ednea de tiempo FullHD (1920\u00d71080). En 8K, estamos hablando de 33 megap\u00edxeles de resoluci\u00f3n por cuadro (UHD = 8.3 megap\u00edxeles). \u00a1Impresionante! Pero ahora, pasemos a los resultados del laboratorio.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Rolling shutter de la Sony A1 <\/h2>\n\n\n\n<p>Filmando a 8K en full-frame a 25 cuadros por segundo, se obtiene un muy buen rolling shutter de 16.6 ms (cuanto m\u00e1s bajo, mejor). Este resultado est\u00e1 a la par con la Canon R5 (que mostr\u00f3 15.5 ms en 8K DCI (17:9, que es un 7% menos de altura de imagen).<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-640x360.jpg\" alt=\"\" class=\"wp-image-189016\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>Rolling shutter de la Sony A1 en 8K a 25fps. <\/figcaption><\/figure><\/div>\n\n\n\n<p>En cuanto a la grabaci\u00f3n full-frame 4K a 25 cuadros por segundo, el rolling shutter cae significativamente a 8.1 ms. Obviamente, aqu\u00ed se est\u00e1 produciendo alg\u00fan tipo de agrupaci\u00f3n de p\u00edxeles, por lo que ser\u00e1 interesante ver si el rango din\u00e1mico se beneficiar\u00e1 al grabar en el modo full-frame 4K con submuestreo frente al full-frame de 8K. En el modo de recorte APS-C a 25 fps, el rolling shutter es de 11.1 ms.<\/p>\n\n\n\n<p>\u00a1Estos valores de rolling shutter son magn\u00edficos para una c\u00e1mara full-frame de 8K! A modo de comparaci\u00f3n, la Sony FX6 (as\u00ed como la Sony a7S III) muestra un rolling shutter de 8.7 ms para la grabaci\u00f3n full-frame UHD de 25 fps y la ARRI ALEXA  <a href=\"https:\/\/www.bhphotovideo.com\/c\/product\/1470346-REG\/arri_k1_0024074_alexa_mini_lf_camera.html\/BI\/7953\/KBID\/8488\/SID\/gunther\/\" class=\"content-keyword-linked\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Mini LF<\/a> muestra 7.4 ms para la grabaci\u00f3n full-frame UHD de 25 fps.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Rango din\u00e1mico de la Sony A1 a ISO800 usando la grabaci\u00f3n interna<\/h2>\n\n\n\n<p>Para conocer c\u00f3mo probamos el rango din\u00e1mico puedes hacer clic <a href=\"https:\/\/www.cined.com\/es\/the-cinema5d-camera-lab-is-back-dynamic-range-tests\/\">aqu\u00ed<\/a>. Al capturar nuestro gr\u00e1fico Xyla21 a ISO800 utilizando el modo SGamut3.Cine\/S-Log3 en grabaci\u00f3n interna de 8K a 25 fps (H265), obtuvimos el siguiente gr\u00e1fico de forma de onda (en una l\u00ednea de tiempo de 8K):<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"290\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3-640x290.jpg\" alt=\"\" class=\"wp-image-189013\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3-640x290.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3-300x136.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3-768x348.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3-507x230.jpg 507w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3.jpg 1135w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>Gr\u00e1fico de forma de onda para la Sony A1 a ISO800 en modo interno 8K SG3.C\/SLOG3. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Se pueden identificar 12 paradas s\u00f3lidas sobre el piso de ruido, y dentro del piso de ruido se observa una parada 13 bastante s\u00f3lida, as\u00ed como una parada 14 m\u00e1s d\u00e9bil.<\/p>\n\n\n\n<p>Esto es consistente con el resultado de IMATEST a una resoluci\u00f3n de 8K (full-frame), que muestra 11.9 paradas de rango din\u00e1mico en una relaci\u00f3n se\u00f1al\/ruido de 2 (SNR) y 13.2 paradas en SNR = 1.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"560\" height=\"600\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-8K-ISO800-SG3C_SLOG3_1.16.1_Step_2.jpg\" alt=\"\" class=\"wp-image-189046\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-8K-ISO800-SG3C_SLOG3_1.16.1_Step_2.jpg 560w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-8K-ISO800-SG3C_SLOG3_1.16.1_Step_2-300x321.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-8K-ISO800-SG3C_SLOG3_1.16.1_Step_2-215x230.jpg 215w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><figcaption>Resultado IMATEST del rango din\u00e1mico interno de 8K para la Sony A1 en SG3.C\/SLOG3 a ISO800. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Adem\u00e1s, en el gr\u00e1fico central de los 3 diagramas sobre la l\u00ednea SNR = 1 (azul), IMATEST identifica aproximadamente 1 &#8211; 1,5 paradas m\u00e1s.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Grabaci\u00f3n 4K interna con muestreo reducido<\/strong><\/h2>\n\n\n\n<p>Ahora, ech\u00e9mosle un vistazo a la imagen full-frame 4K (UHD) con submuestreo reducido grabando UHD XAVC HS interno:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"560\" height=\"600\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-UHD-XAVC-HS-ISO800_1.22.1_Step_2.jpg\" alt=\"\" class=\"wp-image-189049\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-UHD-XAVC-HS-ISO800_1.22.1_Step_2.jpg 560w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-UHD-XAVC-HS-ISO800_1.22.1_Step_2-300x321.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-UHD-XAVC-HS-ISO800_1.22.1_Step_2-215x230.jpg 215w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><figcaption>Resultado IMATEST 4K (full-frame) del rango din\u00e1mico interno de la Sony A1 en SG3.C\/SLOG3 a ISO800. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Como podr\u00e1s ver, al grabar en full-frame UHD en la Sony A1, parece haber alg\u00fan tipo de reducci\u00f3n de la resoluci\u00f3n interna que agrupa los p\u00edxeles y reduce el ruido, lo que lleva a obtener mejores resultados de rango din\u00e1mico: 12,7 paradas para SNR = 2 y 13,8 paradas para SNR = 1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Grabaci\u00f3n externa ProRes RAW en 4.3K a ISO800<\/strong><\/h2>\n\n\n\n<p>Al cambiar la Sony A1 a grabaci\u00f3n RAW externa a trav\u00e9s de HDMI y utilizando el  <a href=\"https:\/\/www.bhphotovideo.com\/c\/product\/1401565-REG\/atomos_atomnjav01_ninja_v_5_4k.html\/BI\/7953\/KBID\/8488\/SID\/gunther\/\" class=\"content-keyword-linked\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Atomos Ninja V<\/a>, obtuvimos una imagen m\u00e1s ruidosa, pero el resultado del rango din\u00e1mico en IMATEST (en comparaci\u00f3n con la grabaci\u00f3n interna de 8K) aument\u00f3 a 12.3 paradas en SNR = 2 (13.3 paradas en SNR = 1), tal como podr\u00e1s ver m\u00e1s abajo. Obviamente, para la grabaci\u00f3n externa de ProRes RAW tambi\u00e9n se est\u00e1 produciendo alg\u00fan tipo de reducci\u00f3n de la resoluci\u00f3n completa del sensor de 4328\u00d72446 en ProRes RAW, lo que aumenta los resultados del rango din\u00e1mico en los umbrales SNR = 2 y SNR = 1.<\/p>\n\n\n\n<p><em>Nota al margen: por alguna raz\u00f3n, no pudimos hacer que la grabaci\u00f3n externa ProRes RAW funcionara con la Sony A1. Los archivos se ve\u00edan bien en el Ninja V, pero estaban da\u00f1ados cuando se reproduc\u00edan en el Ninja o en Premiere Pro. A principios de esta semana, se lanz\u00f3 un nuevo firmware para el Ninja V que resolvi\u00f3 nuestros problemas. Pero, desafortunadamente, no tuvimos tiempo para rehacer la prueba de latitud en ProRes RAW. De todos modos, me alegro de que con la ayuda de mi colega Florian pudimos repetir la prueba de rango din\u00e1mico.<\/em><\/p>\n\n\n\n<p>El gr\u00e1fico de forma de onda nuevamente revela 12 paradas s\u00f3lidas, y tambi\u00e9n se puede ver una parada 13 bastante s\u00f3lida, as\u00ed como una parada 14 m\u00e1s d\u00e9bil:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"290\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3-640x290.jpg\" alt=\"\" class=\"wp-image-192488\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3-640x290.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3-300x136.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3-768x348.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3-507x230.jpg 507w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3.jpg 1134w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>Gr\u00e1fico de forma de onda para la Sony A1 a ISO800 en modo externo 4.3K ProRes RAW (en SG3.C\/Slog3). Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"560\" height=\"600\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/07\/DR-Sony-A1-ISO800-ProRes-RAW-SG3.C_Slog3_Step_2.jpg\" alt=\"\" class=\"wp-image-192491\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/DR-Sony-A1-ISO800-ProRes-RAW-SG3.C_Slog3_Step_2.jpg 560w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/DR-Sony-A1-ISO800-ProRes-RAW-SG3.C_Slog3_Step_2-300x321.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/DR-Sony-A1-ISO800-ProRes-RAW-SG3.C_Slog3_Step_2-215x230.jpg 215w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><figcaption>Resultado IMATEST 4.3K (full-frame) del rango din\u00e1mico externo en ProRes RAW para la Sony A1 a ISO800. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Adem\u00e1s, los resultados IMATEST en ProRes RAW muestran aproximadamente 2 paradas m\u00e1s debajo del piso de ruido por encima del umbral de 13,3 paradas SNR = 1 (l\u00ednea azul en el gr\u00e1fico central de arriba).<\/p>\n\n\n\n<p>Estos son resultados realmente buenos, que representan lo que es posible alcanzar con los sensores de c\u00e1maras A\/D de 12 bits de consumidor, superando a las Panasonic S1H, S1, S5, por ejemplo. En este punto, la Canon R6 se queda muy atr\u00e1s (consulta nuestro art\u00edculo de laboratorio aqu\u00ed), mientras que la Canon R5 alcanza un nivel similar (lee el art\u00edculo aqu\u00ed) solo cuando se dispara en RAW interno, y esta es una caracter\u00edstica \u00fanica de la R5 que no se encuentra en ninguna c\u00e1mara SLR o full-frame en este rango de precios. Por otro lado tambi\u00e9n est\u00e1 la hermosa Z CAM  <a href=\"https:\/\/www.bhphotovideo.com\/c\/product\/1496581-REG\/z_cam_e2_f6_professional_full_frame_6k.html\/BI\/7953\/KBID\/8488\/SID\/gunther\/\" class=\"content-keyword-linked\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">E2-F6<\/a> que dispara ZRAW interno, pero el formato ZRAW es otra historia, puedes leer m\u00e1s sobre eso en nuestro art\u00edculo <a href=\"https:\/\/www.cined.com\/es\/z-cam-e2-f6-review-lab-test-and-sample-footage-a-visit-to-the-zoo-schoenbrunn\/\">aqu\u00ed<\/a>.<\/p>\n\n\n\n<p>Para m\u00ed, la imagen de la Sony A1 luce m\u00e1s natural y menos procesada que la de la Sony a7S III (que se ve obstaculizada por contar con demasiada reducci\u00f3n de ruido interno que no se puede detener).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pruebas de latitud con la Sony A1<\/h2>\n\n\n\n<p>La latitud es la capacidad de una c\u00e1mara para retener colores y detalles cuando se sobreexpone o subexpone y se regresa a la exposici\u00f3n base. Es muy reveladora, especialmente cuando se subexpone, pues permite saber qu\u00e9 tan bien se mantienen los c\u00f3decs y, especialmente, c\u00f3mo se ve la estructura del ruido.<\/p>\n\n\n\n<p>Tal como se mencion\u00f3 anteriormente, debido a nuestros problemas con el  Atomos Ninja V, no pudimos hacer la prueba de latitud en ProRes RAW, por lo que utilizamos la grabaci\u00f3n interna 8K H265.<\/p>\n\n\n\n<p>Como de costumbre, para nuestra prueba de subexposici\u00f3n preparamos la escena ajustando la luz del estudio para que la cara de mi colega Johnnie permaneciera un poco por debajo del recorte (el canal rojo), en F1.4 y un \u00e1ngulo de obturaci\u00f3n de 360\u00b0 (usando el Zeiss Compact Prime de 85mm en T1.5). Al detenernos desde all\u00ed en incrementos de 1 parada, finalmente alcanzamos un valor de luma de alrededor del 60%, y esa fue nuestra exposici\u00f3n base (s\u00f3lo para aclarar, no siempre se obtiene un valor exacto del 60%, ya que depende de c\u00f3mo se distribuyen los valores del c\u00f3digo con la curva LOG respectiva).<\/p>\n\n\n\n<p>Continuamos subexponiendo la imagen deteniendo el iris del lente hasta alcanzar un valor el F8, y luego redujimos gradualmente los \u00e1ngulos de obturaci\u00f3n para reducir a\u00fan m\u00e1s la exposici\u00f3n. En todas las tomas se utiliz\u00f3 SGamut3.Cine\/S-Log3 interno en 8K con un ISO800.<\/p>\n\n\n\n<p>Ahora ech\u00e9mosle un vistazo a la primera toma. Como era de esperar, las 4 paradas por encima de la imagen de exposici\u00f3n base recortan la frente de Johnnie (y algunos parches del corrector de color DSC a la izquierda, al igual que todas las c\u00e1maras Sony con S-Log3), por lo tanto, la primera imagen utilizable est\u00e1 a 3 paradas por encima de nuestra escena de estudio de exposici\u00f3n base (elegida arbitrariamente):<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-640x360.jpg\" alt=\"\" class=\"wp-image-189019\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 3 paradas sobreexpuestas, regresadas a la exposici\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>No hay mucho para ver desde las 2 paradas o 1 parada en adelante\u2026 as\u00ed que avancemos a la escena de 3 paradas subexpuestas y regresadas a la exposici\u00f3n base:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-640x360.jpg\" alt=\"\" class=\"wp-image-189022\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 3 paradas subexpuestas, regresadas a la exposici\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Empieza a aparecer un ruido fino, pero todo parece lucir perfecto: sin cambios de color, sin rayas en la imagen, nada. Muy bien, pasemos a las 4 paradas por debajo regresadas a la exposici\u00f3n base:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-640x360.jpg\" alt=\"\" class=\"wp-image-189025\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 4 paradas subexpuestas, regresadas a la exposici\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>\u00a1De nuevo, la imagen se ve muy bien! As\u00ed que veamos qu\u00e9 revela la imagen obtenida por debajo de las 5 paradas regresadas a la base:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-640x360.jpg\" alt=\"\" class=\"wp-image-189034\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 5 paradas subexpuestas, regresadas a la exposici\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>El ruido de la luminancia y el croma se vuelve muy evidente en la imagen, especialmente en las partes m\u00e1s oscuras de la misma. Esto se puede observar, por ejemplo, en el lado oscuro de la cara de Johnnie y en su camiseta.<\/p>\n\n\n\n<p>La reducci\u00f3n de ruido en DaVinci Resolve (hay m\u00e1s detalles sobre la configuraci\u00f3n a continuaci\u00f3n) hace un muy buen trabajo al eliminar el ruido excesivo y creo que la imagen con 5 paradas por debajo se ve perfectamente bien:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-640x360.jpg\" alt=\"\" class=\"wp-image-189031\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 5 paradas subexpuestas, regresadas a la exposici\u00f3n base mediante la reducci\u00f3n de ruido. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"316\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve-640x316.jpg\" alt=\"\" class=\"wp-image-189028\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve-640x316.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve-300x148.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve-768x380.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve-465x230.jpg 465w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve.jpg 791w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>Ajustes de la reducci\u00f3n de ruido en DaVinci Resolve 17.2 para la imagen de 5 paradas subexpuestas y regresadas a la base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Ahora, la imagen de 6 paradas subexpuestas es interesante, ya que en este punto hemos alcanzado el piso de ruido en las sombras: la cara de Johnnie tiene alrededor del 60% de luma en la exposici\u00f3n base, 5 paradas por debajo de las partes oscuras en la escena del estudio (al alcanzar las 5 paradas por debajo pasamos de 3 por encima de la base a 5 por debajo = 8, m\u00e1s 5 paradas para las partes oscuras en la imagen = 13).<\/p>\n\n\n\n<p>Y aqu\u00ed, a 6 paradas subexpuestas y regresadas a la base, la imagen ya no se puede recuperar: las grandes manchas de ruido de croma junto con el intenso ruido de luma corrompen la imagen hasta el punto tal que incluso cuando se utiliza la reducci\u00f3n de ruido fuerte, los colores no se pueden restablecer:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-640x360.jpg\" alt=\"\" class=\"wp-image-189043\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 6 paradas subexpuestas, regresadas a la exposici\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>El uso de la reducci\u00f3n de ruido produce el siguiente resultado:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-640x360.jpg\" alt=\"\" class=\"wp-image-189040\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 6 paradas subexpuestas, regresadas a la exposici\u00f3n base mediante la reducci\u00f3n de ruido. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"317\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve-640x317.jpg\" alt=\"\" class=\"wp-image-189037\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve-640x317.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve-300x148.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve-768x380.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve-465x230.jpg 465w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve.jpg 788w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>Configuraci\u00f3n de la reducci\u00f3n de ruido en DaVinci Resolve 17.2 para la imagen de 6 paradas subexpuestas y regresadas a la configuraci\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Como se puede ver arriba, las sombras se vuelven rosadas, la imagen muestra bandas pesadas y no se puede recuperar: fin del juego.<\/p>\n\n\n\n<p>Sin embargo, debemos mencionar que alcanzar 8 paradas de latitud de exposici\u00f3n (3 por arriba y 5 por debajo) es un resultado incre\u00edble para un sensor de consumidor que est\u00e1 en l\u00ednea con muchas otras c\u00e1maras en este rango de precios e inferiores, como la Panasonic S1H, S1 y S5. Una c\u00e1mara de cine con un dise\u00f1o de sensor m\u00e1s sofisticado como la ARRI ALEXA  Mini LF (que hemos probado <a href=\"https:\/\/www.cined.com\/es\/arri-alexa-classic-mini-lf-lab-test-rolling-shutter-dynamic-range-and-latitude\/\">aqu\u00ed<\/a>), por ejemplo, muestra 10 paradas de latitud de exposici\u00f3n en nuestra escena de estudio.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Resumen<\/h2>\n\n\n\n<p>Tal como hemos anticipado, la Sony A1 muestra los mejores resultados de las c\u00e1maras de consumidor de \u00faltima generaci\u00f3n en todas las \u00e1reas de la prueba de laboratorio: rolling shutter, rango din\u00e1mico y latitud, utilizando los c\u00f3decs internos. Esta c\u00e1mara muestra claramente que los viejos paradigmas como la necesidad de contar con p\u00edxeles grandes para lograr un buen rango din\u00e1mico ya no son necesarios. Despu\u00e9s de todo, \u00a1estamos hablando de un sensor de 50 megap\u00edxeles!<\/p>\n\n\n\n<p>Para m\u00ed, es bastante claro que mientras estas c\u00e1maras utilicen la arquitectura actual de lectura del sensor de 12 bits para video, no podemos esperar mucho m\u00e1s que estos resultados. Solo a modo de ejemplo, el punto de referencia hasta ahora es la ARRI ALEA  Mini LF que exhibe alrededor de 2 paradas m\u00e1s de rango din\u00e1mico y latitud.<\/p>\n\n\n\n<p><strong>\u00bfYa probaste la Sony A1? \u00bfQu\u00e9 te parece la imagen? \u00a1Cu\u00e9ntanos en los comentarios a continuaci\u00f3n!<\/strong><\/p>\n<192562-main-buylinks\/>","protected":false,"clean_render":"<p><strong>Recientemente pusimos a prueba la nueva c\u00e1mara insignia de Sony de la serie Alpha, la A1, a trav\u00e9s de nuestros procedimientos de laboratorio. \u00bfTienes curiosidad por saber qu\u00e9 tan buena es? Entonces sigue leyendo\u2026<\/strong><\/p><192562-inline-buylinks\/>\n\n\n\n<p>Despu\u00e9s de probar la Sony a7S III hace un tiempo atr\u00e1s, fue agradable tener una c\u00e1mara Sony Alpha nuevamente en mis manos. Realmente me gusta el tama\u00f1o y el peso de la A1, que son bastante peque\u00f1os en comparaci\u00f3n con otras c\u00e1maras full-frame como la Panasonic S1 o S1H, por ejemplo.<\/p>\n\n\n\n<p>La Sony A1 ofrece caracter\u00edsticas espectaculares (puedes leer m\u00e1s sobre ellas <a href=\"https:\/\/www.cined.com\/es\/sony-alpha-1-full-frame-camera-announced-up-to-8k30-and-s-cinetone\/\">aqu\u00ed<\/a>), como full-frame 8K grabado internamente hasta 30 fps o 4K 120fps, todo en 10 bits con codificaci\u00f3n LOG en S-Log2 y S-Log3, y una posibilidad adicional de grabaci\u00f3n ProRes RAW con el grabador externo ATOMOS NINJA 5 (consulta nuestro art\u00edculo aqu\u00ed). Adem\u00e1s, mi querido amigo y colega Johnnie hizo una rese\u00f1a de la c\u00e1mara que incluye uno de sus mini-documentales especiales con la \u201cimpronta Johnnie\u201d <a href=\"https:\/\/www.cined.com\/es\/sony-a1-footage-music-fire-and-me-mini-documentary-and-hands-on-review\/\">aqu\u00ed<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Utilizando la tarjeta NVIDIA GeForce RTX3090 con los archivos Sony 8K H265<\/strong><\/h2>\n\n\n\n<p>Gracias a NVIDIA, tenemos una tarjeta RTX3090 en pr\u00e9stamo en nuestra oficina, y lo creas o no, usar los archivos 8K H265 en una l\u00ednea de tiempo de 8K (7680\u00d74320) en DaVinci Resolve (17.2) fue sencillo y bastante fluido. El uso de memoria de la GPU fue de alrededor de 10GB, con la GPU funcionando en torno al 30% de carga. Al agregar la reducci\u00f3n de ruido (3 cuadros temporales y espaciales), l\u00f3gicamente esto provoc\u00f3 una ca\u00edda masiva de la reproducci\u00f3n, pero igualmente obtuvimos alrededor de 8 fps con la configuraci\u00f3n que podr\u00e1n ver m\u00e1s abajo en este art\u00edculo (5 paradas por debajo con reducci\u00f3n de ruido), donde la carga de la GPU rondaba el 90% y la memoria alcanz\u00f3 los 16GB. Esto es realmente asombroso, ya que la mayor\u00eda de las tarjetas gr\u00e1ficas tienen inconvenientes para reproducir archivos 4K H265 en una l\u00ednea de tiempo FullHD (1920\u00d71080). En 8K, estamos hablando de 33 megap\u00edxeles de resoluci\u00f3n por cuadro (UHD = 8.3 megap\u00edxeles). \u00a1Impresionante! Pero ahora, pasemos a los resultados del laboratorio.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Rolling shutter de la Sony A1 <\/h2>\n\n\n\n<p>Filmando a 8K en full-frame a 25 cuadros por segundo, se obtiene un muy buen rolling shutter de 16.6 ms (cuanto m\u00e1s bajo, mejor). Este resultado est\u00e1 a la par con la Canon R5 (que mostr\u00f3 15.5 ms en 8K DCI (17:9, que es un 7% menos de altura de imagen).<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-640x360.jpg\" alt=\"\" class=\"wp-image-189016\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/RS-Sony-A1-8K-25p-16_6ms.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>Rolling shutter de la Sony A1 en 8K a 25fps. <\/figcaption><\/figure><\/div>\n\n\n\n<p>En cuanto a la grabaci\u00f3n full-frame 4K a 25 cuadros por segundo, el rolling shutter cae significativamente a 8.1 ms. Obviamente, aqu\u00ed se est\u00e1 produciendo alg\u00fan tipo de agrupaci\u00f3n de p\u00edxeles, por lo que ser\u00e1 interesante ver si el rango din\u00e1mico se beneficiar\u00e1 al grabar en el modo full-frame 4K con submuestreo frente al full-frame de 8K. En el modo de recorte APS-C a 25 fps, el rolling shutter es de 11.1 ms.<\/p>\n\n\n\n<p>\u00a1Estos valores de rolling shutter son magn\u00edficos para una c\u00e1mara full-frame de 8K! A modo de comparaci\u00f3n, la Sony FX6 (as\u00ed como la Sony a7S III) muestra un rolling shutter de 8.7 ms para la grabaci\u00f3n full-frame UHD de 25 fps y la ARRI ALEXA  <a href=\"https:\/\/www.bhphotovideo.com\/c\/product\/1470346-REG\/arri_k1_0024074_alexa_mini_lf_camera.html\/BI\/7953\/KBID\/8488\/SID\/gunther\/\" class=\"content-keyword-linked\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Mini LF<\/a> muestra 7.4 ms para la grabaci\u00f3n full-frame UHD de 25 fps.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Rango din\u00e1mico de la Sony A1 a ISO800 usando la grabaci\u00f3n interna<\/h2>\n\n\n\n<p>Para conocer c\u00f3mo probamos el rango din\u00e1mico puedes hacer clic <a href=\"https:\/\/www.cined.com\/es\/the-cinema5d-camera-lab-is-back-dynamic-range-tests\/\">aqu\u00ed<\/a>. Al capturar nuestro gr\u00e1fico Xyla21 a ISO800 utilizando el modo SGamut3.Cine\/S-Log3 en grabaci\u00f3n interna de 8K a 25 fps (H265), obtuvimos el siguiente gr\u00e1fico de forma de onda (en una l\u00ednea de tiempo de 8K):<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"290\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3-640x290.jpg\" alt=\"\" class=\"wp-image-189013\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3-640x290.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3-300x136.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3-768x348.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3-507x230.jpg 507w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Waveform-Sony-A1-8K-ISO800-SG3C_SLOG3.jpg 1135w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>Gr\u00e1fico de forma de onda para la Sony A1 a ISO800 en modo interno 8K SG3.C\/SLOG3. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Se pueden identificar 12 paradas s\u00f3lidas sobre el piso de ruido, y dentro del piso de ruido se observa una parada 13 bastante s\u00f3lida, as\u00ed como una parada 14 m\u00e1s d\u00e9bil.<\/p>\n\n\n\n<p>Esto es consistente con el resultado de IMATEST a una resoluci\u00f3n de 8K (full-frame), que muestra 11.9 paradas de rango din\u00e1mico en una relaci\u00f3n se\u00f1al\/ruido de 2 (SNR) y 13.2 paradas en SNR = 1.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"560\" height=\"600\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-8K-ISO800-SG3C_SLOG3_1.16.1_Step_2.jpg\" alt=\"\" class=\"wp-image-189046\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-8K-ISO800-SG3C_SLOG3_1.16.1_Step_2.jpg 560w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-8K-ISO800-SG3C_SLOG3_1.16.1_Step_2-300x321.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-8K-ISO800-SG3C_SLOG3_1.16.1_Step_2-215x230.jpg 215w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><figcaption>Resultado IMATEST del rango din\u00e1mico interno de 8K para la Sony A1 en SG3.C\/SLOG3 a ISO800. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Adem\u00e1s, en el gr\u00e1fico central de los 3 diagramas sobre la l\u00ednea SNR = 1 (azul), IMATEST identifica aproximadamente 1 &#8211; 1,5 paradas m\u00e1s.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Grabaci\u00f3n 4K interna con muestreo reducido<\/strong><\/h2>\n\n\n\n<p>Ahora, ech\u00e9mosle un vistazo a la imagen full-frame 4K (UHD) con submuestreo reducido grabando UHD XAVC HS interno:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"560\" height=\"600\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-UHD-XAVC-HS-ISO800_1.22.1_Step_2.jpg\" alt=\"\" class=\"wp-image-189049\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-UHD-XAVC-HS-ISO800_1.22.1_Step_2.jpg 560w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-UHD-XAVC-HS-ISO800_1.22.1_Step_2-300x321.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-UHD-XAVC-HS-ISO800_1.22.1_Step_2-215x230.jpg 215w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><figcaption>Resultado IMATEST 4K (full-frame) del rango din\u00e1mico interno de la Sony A1 en SG3.C\/SLOG3 a ISO800. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Como podr\u00e1s ver, al grabar en full-frame UHD en la Sony A1, parece haber alg\u00fan tipo de reducci\u00f3n de la resoluci\u00f3n interna que agrupa los p\u00edxeles y reduce el ruido, lo que lleva a obtener mejores resultados de rango din\u00e1mico: 12,7 paradas para SNR = 2 y 13,8 paradas para SNR = 1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Grabaci\u00f3n externa ProRes RAW en 4.3K a ISO800<\/strong><\/h2>\n\n\n\n<p>Al cambiar la Sony A1 a grabaci\u00f3n RAW externa a trav\u00e9s de HDMI y utilizando el  <a href=\"https:\/\/www.bhphotovideo.com\/c\/product\/1401565-REG\/atomos_atomnjav01_ninja_v_5_4k.html\/BI\/7953\/KBID\/8488\/SID\/gunther\/\" class=\"content-keyword-linked\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Atomos Ninja V<\/a>, obtuvimos una imagen m\u00e1s ruidosa, pero el resultado del rango din\u00e1mico en IMATEST (en comparaci\u00f3n con la grabaci\u00f3n interna de 8K) aument\u00f3 a 12.3 paradas en SNR = 2 (13.3 paradas en SNR = 1), tal como podr\u00e1s ver m\u00e1s abajo. Obviamente, para la grabaci\u00f3n externa de ProRes RAW tambi\u00e9n se est\u00e1 produciendo alg\u00fan tipo de reducci\u00f3n de la resoluci\u00f3n completa del sensor de 4328\u00d72446 en ProRes RAW, lo que aumenta los resultados del rango din\u00e1mico en los umbrales SNR = 2 y SNR = 1.<\/p>\n\n\n\n<p><em>Nota al margen: por alguna raz\u00f3n, no pudimos hacer que la grabaci\u00f3n externa ProRes RAW funcionara con la Sony A1. Los archivos se ve\u00edan bien en el Ninja V, pero estaban da\u00f1ados cuando se reproduc\u00edan en el Ninja o en Premiere Pro. A principios de esta semana, se lanz\u00f3 un nuevo firmware para el Ninja V que resolvi\u00f3 nuestros problemas. Pero, desafortunadamente, no tuvimos tiempo para rehacer la prueba de latitud en ProRes RAW. De todos modos, me alegro de que con la ayuda de mi colega Florian pudimos repetir la prueba de rango din\u00e1mico.<\/em><\/p>\n\n\n\n<p>El gr\u00e1fico de forma de onda nuevamente revela 12 paradas s\u00f3lidas, y tambi\u00e9n se puede ver una parada 13 bastante s\u00f3lida, as\u00ed como una parada 14 m\u00e1s d\u00e9bil:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"290\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3-640x290.jpg\" alt=\"\" class=\"wp-image-192488\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3-640x290.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3-300x136.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3-768x348.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3-507x230.jpg 507w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/Waveform-Sony-A1-4.3K-ProRes-RAW-SG3C_SLOG3.jpg 1134w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>Gr\u00e1fico de forma de onda para la Sony A1 a ISO800 en modo externo 4.3K ProRes RAW (en SG3.C\/Slog3). Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"560\" height=\"600\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/07\/DR-Sony-A1-ISO800-ProRes-RAW-SG3.C_Slog3_Step_2.jpg\" alt=\"\" class=\"wp-image-192491\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/DR-Sony-A1-ISO800-ProRes-RAW-SG3.C_Slog3_Step_2.jpg 560w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/DR-Sony-A1-ISO800-ProRes-RAW-SG3.C_Slog3_Step_2-300x321.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/07\/DR-Sony-A1-ISO800-ProRes-RAW-SG3.C_Slog3_Step_2-215x230.jpg 215w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><figcaption>Resultado IMATEST 4.3K (full-frame) del rango din\u00e1mico externo en ProRes RAW para la Sony A1 a ISO800. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Adem\u00e1s, los resultados IMATEST en ProRes RAW muestran aproximadamente 2 paradas m\u00e1s debajo del piso de ruido por encima del umbral de 13,3 paradas SNR = 1 (l\u00ednea azul en el gr\u00e1fico central de arriba).<\/p>\n\n\n\n<p>Estos son resultados realmente buenos, que representan lo que es posible alcanzar con los sensores de c\u00e1maras A\/D de 12 bits de consumidor, superando a las Panasonic S1H, S1, S5, por ejemplo. En este punto, la Canon R6 se queda muy atr\u00e1s (consulta nuestro art\u00edculo de laboratorio aqu\u00ed), mientras que la Canon R5 alcanza un nivel similar (lee el art\u00edculo aqu\u00ed) solo cuando se dispara en RAW interno, y esta es una caracter\u00edstica \u00fanica de la R5 que no se encuentra en ninguna c\u00e1mara SLR o full-frame en este rango de precios. Por otro lado tambi\u00e9n est\u00e1 la hermosa Z CAM  <a href=\"https:\/\/www.bhphotovideo.com\/c\/product\/1496581-REG\/z_cam_e2_f6_professional_full_frame_6k.html\/BI\/7953\/KBID\/8488\/SID\/gunther\/\" class=\"content-keyword-linked\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">E2-F6<\/a> que dispara ZRAW interno, pero el formato ZRAW es otra historia, puedes leer m\u00e1s sobre eso en nuestro art\u00edculo <a href=\"https:\/\/www.cined.com\/es\/z-cam-e2-f6-review-lab-test-and-sample-footage-a-visit-to-the-zoo-schoenbrunn\/\">aqu\u00ed<\/a>.<\/p>\n\n\n\n<p>Para m\u00ed, la imagen de la Sony A1 luce m\u00e1s natural y menos procesada que la de la Sony a7S III (que se ve obstaculizada por contar con demasiada reducci\u00f3n de ruido interno que no se puede detener).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pruebas de latitud con la Sony A1<\/h2>\n\n\n\n<p>La latitud es la capacidad de una c\u00e1mara para retener colores y detalles cuando se sobreexpone o subexpone y se regresa a la exposici\u00f3n base. Es muy reveladora, especialmente cuando se subexpone, pues permite saber qu\u00e9 tan bien se mantienen los c\u00f3decs y, especialmente, c\u00f3mo se ve la estructura del ruido.<\/p>\n\n\n\n<p>Tal como se mencion\u00f3 anteriormente, debido a nuestros problemas con el  Atomos Ninja V, no pudimos hacer la prueba de latitud en ProRes RAW, por lo que utilizamos la grabaci\u00f3n interna 8K H265.<\/p>\n\n\n\n<p>Como de costumbre, para nuestra prueba de subexposici\u00f3n preparamos la escena ajustando la luz del estudio para que la cara de mi colega Johnnie permaneciera un poco por debajo del recorte (el canal rojo), en F1.4 y un \u00e1ngulo de obturaci\u00f3n de 360\u00b0 (usando el Zeiss Compact Prime de 85mm en T1.5). Al detenernos desde all\u00ed en incrementos de 1 parada, finalmente alcanzamos un valor de luma de alrededor del 60%, y esa fue nuestra exposici\u00f3n base (s\u00f3lo para aclarar, no siempre se obtiene un valor exacto del 60%, ya que depende de c\u00f3mo se distribuyen los valores del c\u00f3digo con la curva LOG respectiva).<\/p>\n\n\n\n<p>Continuamos subexponiendo la imagen deteniendo el iris del lente hasta alcanzar un valor el F8, y luego redujimos gradualmente los \u00e1ngulos de obturaci\u00f3n para reducir a\u00fan m\u00e1s la exposici\u00f3n. En todas las tomas se utiliz\u00f3 SGamut3.Cine\/S-Log3 interno en 8K con un ISO800.<\/p>\n\n\n\n<p>Ahora ech\u00e9mosle un vistazo a la primera toma. Como era de esperar, las 4 paradas por encima de la imagen de exposici\u00f3n base recortan la frente de Johnnie (y algunos parches del corrector de color DSC a la izquierda, al igual que todas las c\u00e1maras Sony con S-Log3), por lo tanto, la primera imagen utilizable est\u00e1 a 3 paradas por encima de nuestra escena de estudio de exposici\u00f3n base (elegida arbitrariamente):<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-640x360.jpg\" alt=\"\" class=\"wp-image-189019\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-over-pb_1.2.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 3 paradas sobreexpuestas, regresadas a la exposici\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>No hay mucho para ver desde las 2 paradas o 1 parada en adelante\u2026 as\u00ed que avancemos a la escena de 3 paradas subexpuestas y regresadas a la exposici\u00f3n base:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-640x360.jpg\" alt=\"\" class=\"wp-image-189022\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-3-under-pb_1.8.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 3 paradas subexpuestas, regresadas a la exposici\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Empieza a aparecer un ruido fino, pero todo parece lucir perfecto: sin cambios de color, sin rayas en la imagen, nada. Muy bien, pasemos a las 4 paradas por debajo regresadas a la exposici\u00f3n base:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-640x360.jpg\" alt=\"\" class=\"wp-image-189025\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-4-under-pb_1.9.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 4 paradas subexpuestas, regresadas a la exposici\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>\u00a1De nuevo, la imagen se ve muy bien! As\u00ed que veamos qu\u00e9 revela la imagen obtenida por debajo de las 5 paradas regresadas a la base:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-640x360.jpg\" alt=\"\" class=\"wp-image-189034\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb_1.10.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 5 paradas subexpuestas, regresadas a la exposici\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>El ruido de la luminancia y el croma se vuelve muy evidente en la imagen, especialmente en las partes m\u00e1s oscuras de la misma. Esto se puede observar, por ejemplo, en el lado oscuro de la cara de Johnnie y en su camiseta.<\/p>\n\n\n\n<p>La reducci\u00f3n de ruido en DaVinci Resolve (hay m\u00e1s detalles sobre la configuraci\u00f3n a continuaci\u00f3n) hace un muy buen trabajo al eliminar el ruido excesivo y creo que la imagen con 5 paradas por debajo se ve perfectamente bien:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-640x360.jpg\" alt=\"\" class=\"wp-image-189031\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-under-pb-NR_1.13.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 5 paradas subexpuestas, regresadas a la exposici\u00f3n base mediante la reducci\u00f3n de ruido. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"316\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve-640x316.jpg\" alt=\"\" class=\"wp-image-189028\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve-640x316.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve-300x148.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve-768x380.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve-465x230.jpg 465w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-5-stops-under-noise-reduction-Resolve.jpg 791w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>Ajustes de la reducci\u00f3n de ruido en DaVinci Resolve 17.2 para la imagen de 5 paradas subexpuestas y regresadas a la base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Ahora, la imagen de 6 paradas subexpuestas es interesante, ya que en este punto hemos alcanzado el piso de ruido en las sombras: la cara de Johnnie tiene alrededor del 60% de luma en la exposici\u00f3n base, 5 paradas por debajo de las partes oscuras en la escena del estudio (al alcanzar las 5 paradas por debajo pasamos de 3 por encima de la base a 5 por debajo = 8, m\u00e1s 5 paradas para las partes oscuras en la imagen = 13).<\/p>\n\n\n\n<p>Y aqu\u00ed, a 6 paradas subexpuestas y regresadas a la base, la imagen ya no se puede recuperar: las grandes manchas de ruido de croma junto con el intenso ruido de luma corrompen la imagen hasta el punto tal que incluso cuando se utiliza la reducci\u00f3n de ruido fuerte, los colores no se pueden restablecer:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-640x360.jpg\" alt=\"\" class=\"wp-image-189043\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb_1.11.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 6 paradas subexpuestas, regresadas a la exposici\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>El uso de la reducci\u00f3n de ruido produce el siguiente resultado:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-640x360.jpg\" alt=\"\" class=\"wp-image-189040\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-640x360.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-300x169.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-768x432.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-1536x864.jpg 1536w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-340x190.jpg 340w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-409x230.jpg 409w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1-1600x900.jpg 1600w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-under-pb-NR_1.14.1.jpg 1920w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>La Sony A1 a 6 paradas subexpuestas, regresadas a la exposici\u00f3n base mediante la reducci\u00f3n de ruido. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"317\" src=\"https:\/\/www.cined.com\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve-640x317.jpg\" alt=\"\" class=\"wp-image-189037\" srcset=\"https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve-640x317.jpg 640w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve-300x148.jpg 300w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve-768x380.jpg 768w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve-465x230.jpg 465w, https:\/\/staging.cined.dev\/content\/uploads\/2021\/06\/Sony-A1-6-stops-under-noise-reduction-Resolve.jpg 788w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption>Configuraci\u00f3n de la reducci\u00f3n de ruido en DaVinci Resolve 17.2 para la imagen de 6 paradas subexpuestas y regresadas a la configuraci\u00f3n base. Cr\u00e9dito de imagen: CineD<\/figcaption><\/figure><\/div>\n\n\n\n<p>Como se puede ver arriba, las sombras se vuelven rosadas, la imagen muestra bandas pesadas y no se puede recuperar: fin del juego.<\/p>\n\n\n\n<p>Sin embargo, debemos mencionar que alcanzar 8 paradas de latitud de exposici\u00f3n (3 por arriba y 5 por debajo) es un resultado incre\u00edble para un sensor de consumidor que est\u00e1 en l\u00ednea con muchas otras c\u00e1maras en este rango de precios e inferiores, como la Panasonic S1H, S1 y S5. Una c\u00e1mara de cine con un dise\u00f1o de sensor m\u00e1s sofisticado como la ARRI ALEXA  Mini LF (que hemos probado <a href=\"https:\/\/www.cined.com\/es\/arri-alexa-classic-mini-lf-lab-test-rolling-shutter-dynamic-range-and-latitude\/\">aqu\u00ed<\/a>), por ejemplo, muestra 10 paradas de latitud de exposici\u00f3n en nuestra escena de estudio.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Resumen<\/h2>\n\n\n\n<p>Tal como hemos anticipado, la Sony A1 muestra los mejores resultados de las c\u00e1maras de consumidor de \u00faltima generaci\u00f3n en todas las \u00e1reas de la prueba de laboratorio: rolling shutter, rango din\u00e1mico y latitud, utilizando los c\u00f3decs internos. Esta c\u00e1mara muestra claramente que los viejos paradigmas como la necesidad de contar con p\u00edxeles grandes para lograr un buen rango din\u00e1mico ya no son necesarios. Despu\u00e9s de todo, \u00a1estamos hablando de un sensor de 50 megap\u00edxeles!<\/p>\n\n\n\n<p>Para m\u00ed, es bastante claro que mientras estas c\u00e1maras utilicen la arquitectura actual de lectura del sensor de 12 bits para video, no podemos esperar mucho m\u00e1s que estos resultados. Solo a modo de ejemplo, el punto de referencia hasta ahora es la ARRI ALEA  Mini LF que exhibe alrededor de 2 paradas m\u00e1s de rango din\u00e1mico y latitud.<\/p>\n\n\n\n<p><strong>\u00bfYa probaste la Sony A1? \u00bfQu\u00e9 te parece la imagen? \u00a1Cu\u00e9ntanos en los comentarios a continuaci\u00f3n!<\/strong><\/p>\n<192562-main-buylinks\/>"},"excerpt":{"rendered":"<p>Recientemente pusimos a prueba la nueva c\u00e1mara insignia de Sony de la serie Alpha, la A1, a trav\u00e9s de nuestros procedimientos de laboratorio. \u00bfTienes curiosidad por saber qu\u00e9 tan buena es? Entonces sigue leyendo\u2026 Despu\u00e9s de probar la Sony a7S III hace un tiempo atr\u00e1s, fue agradable tener una c\u00e1mara Sony Alpha nuevamente en mis manos. Realmente me gusta el tama\u00f1o y el peso de la A1, que son bastante peque\u00f1os en comparaci\u00f3n con otras c\u00e1maras full-frame como la Panasonic S1 o S1H, por ejemplo. La Sony A1 ofrece caracter\u00edsticas espectaculares (puedes leer m\u00e1s sobre ellas aqu\u00ed), como full-frame 8K grabado internamente hasta 30 fps o 4K 120fps, todo en [&hellip;]<\/p>\n","protected":false},"author":8845,"featured_media":192510,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[{"id":42287,"name":"Pruebas de Laboratorio","link":"https:\/\/staging.cined.dev\/es\/pruebas-de-laboratorio\/","slug":"pruebas-de-laboratorio"}],"tags":[39707,27551,56106,27552,57984,27558,59748,29654,59749,33638,59750,34229,37196],"tag_label":[53001],"brand":[51341],"class_list":["post-192562","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pruebas-de-laboratorio","tag-latitude-es","tag-dynamic-range-es","tag-sony-alpha-1-es","tag-lab-test-es","tag-sony-a1-es","tag-rango-dinamico","tag-cined-lab-test-es","tag-nueva-camara","tag-prueba-de-laboratorio-de-la-sony-a1","tag-rolling-shutter-es","tag-prueba-de-laboratorio-cined","tag-prueba-de-laboratorio","tag-latitud","tag_label-lab-test-es","brand-sony-es"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.10 (Yoast SEO v25.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Prueba de laboratorio de la Sony A1 - Rolling shutter, rango din\u00e1mico y latitud | CineD<\/title>\n<meta name=\"description\" content=\"We test the Sony A1 in our CineD Lab for rolling shutter, dynamic range and latitude using internal 8K, 4K and external ProRes RAW recording.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/staging.cined.dev\/es\/sony-a1-lab-test-rolling-shutter-dynamic-range-and-latitude\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Prueba de laboratorio de la Sony A1 - Rolling shutter, rango din\u00e1mico y latitud | CineD\" \/>\n<meta property=\"og:description\" content=\"We test the Sony A1 in our CineD Lab for rolling shutter, dynamic range and latitude using internal 8K, 4K and external ProRes RAW recording.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/staging.cined.dev\/es\/sony-a1-lab-test-rolling-shutter-dynamic-range-and-latitude\/\" \/>\n<meta property=\"og:site_name\" content=\"CineD\" \/>\n<meta property=\"article:publisher\" content=\"http:\/\/www.facebook.com\/C5Dnews\" \/>\n<meta property=\"article:published_time\" content=\"2021-07-02T15:49:09+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-07-02T17:53:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.cined.com\/content\/uploads\/2021\/07\/Sony-A1-Thumbnail.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Gunther Machu\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@GunMac\" \/>\n<meta name=\"twitter:site\" content=\"@c5dnews\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Gunther Machu\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"12 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/staging.cined.dev\/es\/sony-a1-lab-test-rolling-shutter-dynamic-range-and-latitude\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/staging.cined.dev\/es\/sony-a1-lab-test-rolling-shutter-dynamic-range-and-latitude\/\"},\"author\":{\"name\":\"Gunther Machu\",\"@id\":\"https:\/\/www.cined.com\/#\/schema\/person\/6b456bcc9e28f338bf91c8ce3ee8406b\"},\"headline\":\"Prueba de laboratorio de la Sony A1 &#8211; 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