I have been shooting slides with my Elan 7e so that I can print them on the Daylab and do manipulations. When I look at the slides, they look great, the colors are awesome, but when I scan them into my computer they look muted and underexposed. Is that the slide or the scanner? How can I tell if it's a properly exposed slide? I would just get prints from them, but they charge $1 a print!