Why bother changing base ISO?

Started Jul 18, 2007 | Discussions thread
Tom Christiansen Senior Member • Posts: 2,239
Re: Nick...

MK914 wrote:

When I do similar tests, I see less noise in the shadows with the
"properly" exposed, higher ASA shots. With the pushed shots there's
more noise but sharper edges. I'm using a D200.

Is this what you're seeing?

That's not what I see in the two comparison postings I just responded
to, the ones kindly provided by Nick Davis. Do you see those pairs
differently than I'm seeing them?

On your own tests, what raw processor were you using, and how much
did you push the exposure? Also, from where to where; that is, did
you cross the D200's unity-gain threshhold of ISO 800, or were you
always below that?

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tom

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