A7RM2 records 12-bit raw

jonasjuffinger / TimeLapse

A time lapse app for Sony Alpha camera using the OpenMemories framework

MIT License

153 stars 27 forks source link

A7RM2 records 12-bit raw #47

Open terrancewong opened 10 months ago

terrancewong commented 10 months ago

using this with single shot mode, E shutter(silent shooting) or M shutter, the camera records 12-bit raw files. But pressing the shutter button records 14-bit raw files.

Body: ILCE-7RM2 
Ver: 4.01

terrancewong commented 3 months ago

ok, my bad. this is well known sony compression issue. their "compressed" RAW has 8-11 bits dynamic range, average only 8.1bit, and very bad crosstalk. and their ARW uncompressed RAW not even doing bit pack, output is 16-bit with much less entropy.

A7RM2 can only record lossless RAW when using mechanical shutter, single mode, and compression off.