Nikon LS-3500 - LS-3510 - Manual (Page 59)

Using the Windows Scanner Plugin 6-9
Software Reference for Scanners
overall green cast is to increase the Blue and Red exposures by equal amounts.
Equal amounts of Blue and Red are equivalent to the same amount of Magenta,
which is the complimentary or opposite color to Green and will neutralize it.
> Note When increasing the analog exposure for a Positive scan, the resulting image
or color will be lighter than before. When increasing the analog exposure for
a Negative scan, the resulting image or color will become darker.
The same rules apply to Exposure . Changing the exposure values here will
affect Red, Green and Blue settings by an equal amount. This is a simple way to
increase the brightness of a dark original transparency, without affecting the color
balance of the resulting image. Again, the useful range of values typically falls
between 40 and 120.
If both the exposure and color balance are changed, the effect will be
multiplied. For instance, an exposure of 25 will halve the time for all colors and a
red balance of 100 will double the time for the red only.
(25/50 X 100/50 = 50/50 = 1)
> Note Increasing exposure time will darken negatives and lighten positives and
decreasing exposure time will lighten negatives and darken positives.
The combination of the exposure and color balance controls can produce an
effect that the scanner cannot produce. The scanner has a minimum exposure time
which will limit the exposure value to about 20. This will vary depending on how
dark the slide is, which is determined during autoexposure. On the high end,
overexposing the CCD will cause overloading and a 'bucket brigade' streaking
effect.
Fig. 66 The Lighting Control
The Lighting list box only appears for color negative film types. It can be used
to adjust the color of the image based on what lighting conditions the original
subject was photographed under. These conditions are expressed as color
temperature. For instance,
Early Sunset has a color temperature of 2000
°
K and
Skylight has a temperature of 7000
°
K. Lower numbers are more orange in color
and higher numbers are more blue. Selecting Custom... will allow you to enter a
specific color temperature between 2000
°
K and 7000
°
K.