Gordon, did you see this (in the other forum)?

Started May 3, 2013 | Discussions thread
beholder3
Regular MemberPosts: 304
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Re: Gordon, did you see this (in the other forum)?
In reply to Kerusker, May 4, 2013

For those interested into these types of topics I recommend this long essay on how Canon manipulates raw data before the pre-cooked stuff is written into CR2 files:

http://www.stark-labs.com/craig/resources/Articles-&-Reviews/CanonLinearity.pdf

"Canon is rescaling your data before it hits the CR2 file. Based on the thermal signal both shifting your histogram left (likely based on stats from the optical black portion), it is changing and scaling the intensity (i.e., subtracting a constant from the whole image) the contrast or gain."

Thsi is not about manufacturers. They all do it.

Here Nikon:

http://forum.photozone.de/index.php?/topic/162-how-does-nikon-do-it/

Here Leica:

http://www.dxomark.com/index.php/Publications/DxOMark-Reviews/DxOMark-review-for-the-Leica-M9

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