Sony is only attaining a 2:1 compression with a chaotic process. Most people do not understand how the artifacts manifest themselves, and don’t have the time to assess if a particular scene will cause the issue. I don’t hesitate to use craw in many circumstances where quality if paramount. Unless Sony offers a Lossless-compressed mode, shoot uncompressed for anything important. Once you understand how the artifacts manifest, it’s pretty easy to look at a scene and decide if you’ll need lossless or not.
Given the pixel count of the Sony sensor and resolution of the lenses used on it, this algorithm would do well. The running difference algorithm requires very little processing power and buffer space, does well with oversampled data. With the processing power and buffer memory available, lossless compression schemes are available that avoid the artifacts produced by the Sony algorithm. With the processing power and buffer storage available, lossless compression is not hard to implement and will not produce the artifacts of the Sony algorithm. The problem with the lossy-compressed RAW format is that it is “Chaotic”, you don’t know what will be lost as it depends on the structure of the image.
Helicon remote sony a7r3 series#
The original series only offered lossy-compressed RAW, adding uncompressed RAW was done after many users complained. I’m surprised that Sony does not have “Lossless Compressed”. The lossy-compressed RAW can cause problems in certain instances.
According to the above article, and “some quick web-surfing”, Sony offers uncompressed RAW and lossy-compressed RAW.
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