Electronic shutter on the Sony A7R II

Started 4 months ago | Discussions thread
OP Igor Sotelo Regular Member • Posts: 461
Re: Electronic shutter on the Sony A7R II

Was trying to learn something about AP procedures and postprocessing, and was looking this 2015 presentation from Christopher Go:

It seems to me he may have some bias towards Celestron or OPT, but otherwise knows a lot about AP. After the seminar, at 44:00 is asked if one should use 8-bit, 10-bit, 12-bit or 16-bit cameras.

He says: "actually, for planetary imaging, there's no point of using anything higher than 8". Not sure if that applies to DSO imaging, though.

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From what have seen so far, one of the problems with the A7R II is that after the shutter speed is longer than 3.2s, the camera applies some kind of "star eating" algorithm, that can't be disabled.

This can be avoided if the shots are taken in C mode, where the color depth drops from 14-bit to 12-bit. The explanation, is that the processing power of the A7R II is not enough for 14-bit or to apply the star eating algorithm in continuous mode.

The A7R III also has the the same star eating algorithm applied when the exposure is longer than 3.2s. But since the A7R III has much higher processing power, the problem can't be solved by using the C mode.

 Igor Sotelo's gear list:Igor Sotelo's gear list
Nikon D800 Canon EOS 6D Nikon Df Canon EOS 5DS Sony a7R II +14 more
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