There was a time, in a land far, far away, that a device could be attached to film cameras so one could copy slides. For those of you who remember this device, is there one available for the digital age? I have slides and negatives that I'd like to digitize with the same type of method if possible. I mean, I have a really fine digital camera (20D) and tons of old slides and negatives. Might as well experiment. Got nothing to lose 'cept battery power.