高像素时代 C-raw了解一下# PhotoGear - 摄影器材
h*c
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索尼昨天发布61M 据说佳能的75M 那么相应的Raw文件有多大?索尼一般是像素X2 比如
A73是24M,那么不压缩的Raw是48M大概,压缩的是24MBUT连拍时损一档动态范围。佳能
的非压缩RAW一般是像素X1.2 比如EOSR 30M 那么不压缩RAW是36M大概 C-raw是佳能的
压缩raw,一般再小一半,也就是像素X0.6,比如EOSR的压缩RAW是18M大概。据DPREVIEW
佳能的CRAW只有在拉4档曝光的时候才看得出差别,所以,溅射们可以放心使用。
那么61M的A7R4的RAW是120M,佳能75M的C-raw可能是45M。溅射们选哪个?
From Dpreview
Like the a7R III, the a7 III can maintain its full dynamic range in
continuous drive modes, thanks to 14-bit readout in bursts when shooting
uncompressed Raw. If you shoot compressed Raw, the camera drops to 12-bit
sensor readout in continuous drive modes. This negatively impacts dynamic
range, dropping 1.4 EV at base ISO and roughly 1 EV at ISO 640.
A73是24M,那么不压缩的Raw是48M大概,压缩的是24MBUT连拍时损一档动态范围。佳能
的非压缩RAW一般是像素X1.2 比如EOSR 30M 那么不压缩RAW是36M大概 C-raw是佳能的
压缩raw,一般再小一半,也就是像素X0.6,比如EOSR的压缩RAW是18M大概。据DPREVIEW
佳能的CRAW只有在拉4档曝光的时候才看得出差别,所以,溅射们可以放心使用。
那么61M的A7R4的RAW是120M,佳能75M的C-raw可能是45M。溅射们选哪个?
From Dpreview
Like the a7R III, the a7 III can maintain its full dynamic range in
continuous drive modes, thanks to 14-bit readout in bursts when shooting
uncompressed Raw. If you shoot compressed Raw, the camera drops to 12-bit
sensor readout in continuous drive modes. This negatively impacts dynamic
range, dropping 1.4 EV at base ISO and roughly 1 EV at ISO 640.