One other thing you might try that I didn't think to mention before is taking a piece of cardstock (index card, backing board, etc) and cutting a window in it just slightly smaller than the negative you are scanning, and use that to "frame" the negative before placing the light source over it. That way the only light coming through to the scanner is through the negative rather than the stronger light coming from around the negative to mess up your scan. Depending on your scanner software, it may automatically "adjust" the brightness and contrast of the scan to compensate for the additional light coming in, which won't help your scan.
That would be more for the flashlight method. Using ambient light, if you're getting a greenish tint to the image, you might try either scanning in b/w, or after you've scanned, converting the image to b/w in Photoshop. It's going to be tough to eliminate all color from your scan using ambient light I think. My guess would be that if you just did a scan, with nothing on the scanner and the scanner lid open, the image you get would also have a greenish tint.
|