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elec164

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"RE: DX mode file size"

elec164 Silver Member Nikonian since 15th Jan 2009
Mon 18-Mar-13 12:55 PM | edited Mon 18-Mar-13 12:57 PM by elec164

>If I am incorrect I hope that someone will jump in to help us
>out.
>

No, I believe you're correct.

Quote from Bill Claff's site "My definition of Photographic Dynamic Range is a low endpoint with an SNR of 20 when adjusted for the appropriate Circle Of Confusion (COC) for the sensor".

And I believe this is also a similar manner in which DxOMark provides its ratings via Normilization. That's to say that if you compare a D7000 and D800 sensel performance, they will be fairly close in that they are of similar pixel pitch. It's when you account for difference in format size is when the D800 becomes superior.

Some time ago when I was more curious about this and before Bill rejoined Nikonians, I asked Dr. Clark why there is such a disparity between his results and Bill's. At first he just answered at least Bill defines the basis of his results compared to other site's. But when I pressed for a better explanation, he felt that Bill's criteria for noise was to stringent. Then Bill rejoined Nikonians and in reply to Dr. Clark's response he felt Dr. Clark was a bit lenient in his numbers. Which leaves us mere mortals scratching our head in an attempt to wade through all the data.

At least I hope I got all that right!

Pete

Pete

Visit my Nikonians gallery.

A general, generic topic DX mode file size [View all] , swannking , Wed 27-Feb-13 01:13 PM
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