Why is minimum native ISO 200 on many mirrorless cameras?

Started 2 months ago | Questions thread
OP Charley123 Senior Member • Posts: 1,054
Plausible Answer...

In this this thread, and at other online sources, many possible answers have been put forward.

The explanation I consider most plausible-likely is the following...

Crop sensor cameras are at a disadvantage in low light compared to full frame sensors. To (partially) offset that, smaller sensor cameras' are sometimes designed with ISO 200 (instead of 100) as their lowest native ISO. This gains the camera one stop higher ISO capability at the high end of its native ISO range, and allows it to have acceptable image quality at 1 stop higher ISO than would otherwise be the case.

The sacrifice being there is no native 100 ISO, but that doesn't affect most of the public.

The people likely to be affected by this (me) are enthusiasts wanting to use fill flash on a sunny day, or wanting shallow DOF on a sunny day, but these people will know enough to figure out a solution, such as using an ND filter.

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