What ISO to keep on A mode?

Started 5 months ago | Questions thread
BobSC
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Re: What ISO to keep on A mode?
In reply to WryCuda, 5 months ago

WryCuda wrote:

I can't see any difference between images taken at ISO 100 vs. 200, and since many of my lenses have maximum apertures of f/4, the extra ISO gives me an extra "stop".

I haven't investigated that myself, but people who test for stuff like that can measure a difference. According to the graphs, there is more difference on my d200 between 100 and 200 than there is between 200 and 400. Based on that I might as well keep it at 100 and then change it to 400 and skip 200 all together.

https://www.imaging-resource.com/PRODS/D200/D200IMATEST.HTM

With the Nex3n I just got, there is no 100 setting, but it's linear from 200 to 3200:

http://www.imaging-resource.com/PRODS/NEX3/NEX3IMATEST.HTM

Curious thing in the graph on the last link -- they show the EP2 having less noise at 800 than 400, and in fact almost as little noise at 800 as 200. That's wild!

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