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Photo Forum / Digital Photography / Digital Photo / February 2005

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Nikon D2H Black Silk

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Jack - 23 Feb 2005 16:47 GMT
Hi
I do wedding photography  were the men wear black silk coats. I bought a
Nikon D2H camera, fast focusing for catching action and dancing shots and
I'm now fine tuning the color. To my horror I notice that the black silk now
has a distinct reddish color. I did not have this problem with the D100
camera.

I spoke to Nikon and they casually tell me that the D2H is picking up
infrared color/light from the black silk. Apparently black silk and flash
strobes generates more infrared then anything else.

Response from Nikon;
"The effect that you are seeing is due to the amount of infra red
light reflected from the coat. Digital sensors "see" a much wider spectrum
of light than the human eye. The sensor will also capture light that is not
detected by the eye and record this in the file.
This is most noticeable with dark clothing as it will reflect a high
level of infra red light. This is why the coat has a slight red cast"

http://www.photo-miracles.com/D2H/Page05.html

Mentions that the D2H is the "best" camera for shooting infrared pictures.
i.e. is the "worst" camera for shooting shiny black silk with strobes.

Apparently one can buy a "hot mirror" filter, to filter out the infrared
pollution on the D2H.
Is this acceptable? Do I need to buy extras for this camera and who knows
what horrors this "hot mirror" will throw up?

Do you think that my store will give me my money back?

Looks like digital is going through the same evolution as color film did 30
years ago (and there's not much competition).

Thanks
J
GTO - 24 Feb 2005 03:54 GMT
This is absurd. I heard a similar explanation on Tom Hogan's web-page ("It
appears that any object that reflects near IR has a tendency to run up the
blue channel response in the D2H, which in turn makes for slight color
shifts and increased noise." at http://www.bythom.com/d2h.htm). It seems
that Nikon's customer support just copies this explanation and feeds it back
to its customers. The D2H is less sensitive than the D1X to infrared. The
D70 (and I must assume also the D100) are equally well suited for IR
photography than the D2H.

The D2H has a different behavior with chromatism. (In a way, it's the image
sensor's "hallucinatory perception" of colored lights). You can make a
Google search to find many posts discussing this camera for its color
behavior. You need to upload the right curves before doing any portrait
photography.

Maybe Nikon fixed this with their newly introduced D2Hs.

Gregor

> Hi
> I do wedding photography  were the men wear black silk coats. I bought a
[quoted text clipped - 35 lines]
> Thanks
> J
 
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