The latest on D7000 skin tones?

Started May 24, 2011 | Discussions thread
Cytokine
Contributing MemberPosts: 626
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Re: some measured color data
In reply to rhlpetrus, May 25, 2011

rhlpetrus wrote:

If one checks the color depth indexes for a few Nikons, including the ones mentioned in these posts, at DxO Mark RAW tests, we see that there are 3 groups: the early 6MP CCD sensor cameras at 20bits, the 10MP CCD sensor generation and he first two generations of CMOs APS-C sensors (D200, D2x, D300) at 22 bits, then the D7k sensor and D700, both at same level (23.5 bits), then the amazing D3x's sensor (24.7 bits), see list below.

By the way D200 is CCD dual channel sensor not CMOS, Nikon's Patent and the only one ever made.

If one takes into account that the D3x's sensor is 2.25 x larger in area as the D7k's, that is exactly reflected in the 1.2 bit more in color depth, so CFA and algorithms used for D7k are at about the same technological level as those of the D3x's.

D70 - 20.4 bits
D300 - 22.1 bits
D2xs - 22.2 bits
D200 - 22.3 bits
D7k - 23.5 bits
D700 - 23.5 bits
D3x - 24.7 bits

Here is how DxO Mark comment on their score:

"The best image quality metric that correlates with color depth is color sensitivity. Color sensitivity indicates to what degree of subtlety color nuances can be distinguished from one another, often meaning a hit or a miss on a pantone palette. Maximum color sensitivity reports, in bits, the number of colors that the sensor is able to distinguish."

So how does that square with the DXO Sensitivity metamerism Ind.,?
Standard ISO 17321. CIE/D50 (Matching Daylight Source)
D300/D200/D70 = 84
D2Xs D700/D5000 = 83
D3000 = 80
D80/D3x = 79
D7000/D5100 = 78
D3/D300s = 77

So, all this about D70 or D200 or D2x having better colors than D7k or D700 or D3x are not really justified by the measurements.

There is allot of extra technology going on in the D3 and D3x to create accurate colours, the question is rightly being asked has the D7000 inherited this or is this a new Nikon approach. John

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