a7III EDR and precision in continuous bracketing mode

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JimKasson
JimKasson Forum Pro • Posts: 18,432
a7III EDR and precision in continuous bracketing mode
7

I was asked on the forum to look into this and report. I have obliged. The Cliff Notes version:

In uncompressed raw mode, with the mechanical shutter (and, presumably, EFCS) EDR and precision are the same in continuous bracketing mode as it is in single shot or continuous low. The electronic shutter won't bracket in uncompressed raw mode.

In compressed raw mode, both the mechanical shutter (and, presumably, EFCS) and the electronic shutter EDR is a bit over a stop worse at all ISO settings than it is in single shot or continuous low. The precision drops from 14 to 12 bits.

Details here:

https://blog.kasson.com/the-last-word/sony-a7iii-edr-in-continuous-bracketing-mode/

Here's a discussion of EDR in SS and CL shutter drive modes, using all three shutter modes:

https://blog.kasson.com/a7iii/a7iii-edr-vs-shutter-drive-mode/

I'll be happy to answer questions.

Jim

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