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Old 07/31/07, 04:12 PM   #3 (permalink)
Jamie Roberts
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Join Date: 07/09/06
Location: Cambridge
Posts: 2,495
Default Re: M8 now in KammaGamma color comparsion data base

A mildly interesting JPEG analysis (not RAW folks).

I also don't like their gamut methodology--printed patches are notoriously undersaturated. So when they essentially plot the response of a 1d3, 1ds2 and the M8 as being less, essentially, than sRGB, well, that's just wrong and quite misleading.

EDIT: for Ron and others--

First, they're only testing the JPEG response of the camera--or how Leica has dialled in the colour from a RAW data capture.

What they're doing is measuring the pictures they get under controlled lighting of Gretag Macbeth colour targets, then defining the difference in colour (delta C). The greater the difference, in theory, the less "accurate" the camera.

Which is of course mostly hogwash, which they admit themselves, actually. Most colour films--not to mention colour JPEG interpretation--is tweaked for human vision, not accuracy. Sometimes accurate colorimetric data looks quite terrible.

As for gamut--they are limited because printing is limited, and they're shooting a printed target. This tells you absolutely completely nothing about how, for example, the camera will render deep blue lakes or red sunsets. They're simply out of gamut for a GM chart--there are no inks in existence that can reproduce those colours or intensities (as everyone who has seen a sunset knows).

So--on the very limited basis described here--it's an interesting comparison.

Since most people don't shoot under these conditions, or with these intentions, it's only mildly interesting (and mildly useful); the gamut stuff is downright flawed.
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Last edited by Jamie Roberts : 07/31/07 at 04:21 PM.
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