> In case it might be of interest, here's the text from my LS-30 > Nikonscan manual (pdf file): > > Analog gain is used to adjust the intensity of the scanners light > source, emphasizing selected colors in the input image. The > controls for analog gain consist of four sliders: a master slider > that allows the user to increase the brightness of all LEDs in the > scanners light source simultaneously, and red, green, and blue > sliders that allow independent adjustment of the red, green, and > blue LEDs. > Moving a slider to the right increases the intensity of the affected > LED; moving it to the left decreases the intensity. Click > the Help button for information on using analog gain. > Note: Setting the intensity of the scanners light source too high > may produce smear or other defects in the scanned image.
Thanks! That makes perfect sense. Typical illumination for a scanner isn't variable...but with the Nikon LED system, it's easily adjustable (though linearity has typically been a problem with LEDs, but probably not in the range that are required for scanner use).
