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You can try to scan slides on a flatbed, but even for web use this practice just doesn't cut the mustard. You can have a print made of the slide first, then scan the print. Or have a negative made. The negative is large than the slide, and you can capture much more detail (don't use "invert image" on your controls to get the image after scanning - more about that in "Make Your Scanner a Great Design and Production Tool" listed in my product section - too lengthy to detail here...). The third possibility is to have the slide converted to an image on CD. Most photo houses use a drum scanner for this high-quality result.