D200 vs D70 Dynamic Range graph

Started Jan 30, 2006 | Discussions thread
Bill Janes Senior Member • Posts: 1,848
Re: Can you clarify?

davexl wrote:
Thanks for fleshing that out Bill, but to clarify:

Bill Janes wrote:

Yes, your test does give a perfectly valid test of DR, but in a
photograph with a full dynamic range of exposure values, the tone
curve changes.

and also:

In your zone system analogy, the camera uses a different
development for high and low contrast scenes.

Ok, these statements are what I need you to back up with proof - I
contend that the D200 at Normal tone curve, fixed WB does not do
anything of the sort.

David,

Right now I can't back up with any proof what I have said, since I don't know the transfer curve that the D200 uses for its normal tone curve or whether it is adapatve or not. I suppose it is adaptave of you are using automatic contrast, but probably not with the normal curve. In that case, you should ignore my last comment that you quoted. When I get my step wedge I can do some tests and report back. For some explanation of this topic refer to Norman Koren's web site below and look at the heading under dynamic range.

http://www.normankoren.com/digital_tonality.html

In the example for the Canon EOS 10D the transfer curve curve is quite different for a Capture 1 conversion and for the Canon software
--
Bill Janes

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