f8 and 1/2500 on an A7Riv

Started 2 months ago | Questions thread
SigZero Regular Member • Posts: 429
Re: f8 and 1/2500 on an A7Riv

PWPhotography wrote:

As you said this 2nd native ISO 320 seems too low and too close to base ISO 100. Unless it has extra benefits I prefer 2nd ISO 640 in other Sony sensors in A7r III, A7 III and A9.

I think that ISO 320 is not a Sony decision but technological limitation. Dual gain works by adding additional "capacitance" to each pixel in lower gain setting. In case of such dense sensor it is probably difficult to add more to have those iso steps more separated. On the other hand APS-C cameras have similar pixel pitch and dual gain at ISO 640 or 800.

I would also like to have more control over auto-iso in case of dual-gain cameras. In case of A7R4 the lower ISO range have some negative shadow improvement - which means that those ISO's should not be used at all (125-250).

Br, Pawel.

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