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Image parameters (contd.)

Saturation adjustment

Saturation adjustment allows you to control the strength of color in the final image. Once again the D200 provides only three user settings (effectively -1, 0 and +1), which is kind of disappointing in a modern advanced digital SLR.

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Hue adjustment

The hue adjustment setting allows you to make some subtle changes to the hue output of the image, it is useful for compensation of hue shifts caused by certain artificial light. The D200 manual describes Hue adjustment in this way:

The RGB color model used in digital photographs reproduces colors using differing amounts of red, green, and blue light. By mixing two colors of light, a variety of different colors can be produced. For example, red combined with a small amount of green light produces orange. If red and green are mixed in equal amounts, yellow results, while a smaller amount of red produces a yellow green. Mixing different amounts of red and blue light produces colors ranging from a red dish purple through purple to navy, while mixing different amounts of green and blue light produces colors ranging from emerald to turquoise. (Adding a third color of light results in lighter hues; if all three mixed in equal amounts, the results range from white through gray.) When this progression of hues is arranged in a circle, the result is known as a color wheel.

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High ISO Noise Reduction


Test Scene
The D200 provides four selectable levels of in-camera high ISO noise reduction (compared to the three levels of the D2X). In any of the 'On' positions (Low, Normal or High) noise reduction is applied to images of ISO 400 or above, in the 'Off' position some (minimal) noise reduction is still applied to images of ISO 800 or above. To compare the effect of the different levels of noise reduction we shot a dark scene (deliberately under-exposed) at ISO 1600 and 3200 using each noise reduction level, a long exposure ISO 100 shot is included for color and detail reference.

As you can see in the samples below there's almost no difference between Off and Low, at Normal or High the noise reduction algorithm introduces noticeable smoothing and some detail is lost due to this. Another side-effect of the noise / NR is a reduction in color saturation. If you're not overly troubled by some visible noise the Low setting is sufficient at ISO 1600 and won't have a significant effect on detail.

ISO 1600

At ISO 1600 the introduction of noise and the effect of the noise reduction algorithm caused an average 10% decrease in color saturation (fairly equal across all channels).

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ISO 3200 (equiv.)

At ISO 3200 (one stop over the calibrated maximum) the introduction of noise and the effect of the noise reduction algorithm caused an average 18% decrease in color saturation (more so for shades of blue).

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Other features

The D200 also provides Multiple Exposure and Image Overlay features which we covered in some detail in our Nikon D2X review.

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Comments

CagomoC
By CagomoC (4 months ago)

Two of awesome creative machines that I still use. I'll never give them up. I haven't reached 20,000 shutter counts yet! had these babies since 2006.

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