While it's true that all scanners can scan mounted slides, only 2 can
do it with any efficiency:
1. Nikon LS5000-has attachment for about 50 slides at a crack, ~$1600
for everything.
2. Pacific Imaging scanner and clones thereof that supposedly takes
carousels as well as stacks of slides, AND supposedly scans slides in
vertical or horizontal orientation. However, one poster here said it
didn't work with carousels. Reviews on this machine have not been
good. However, you can't beat the price, ~$650. Now if Nikon or
Minolta would just make a machine with these specs!!!
Ed Lusby
The Pacific Imaging scanner does use round trays which they call "carousels",
but these are not the same as or compatible with the standard Kodak Carousel
trays. I think they're the 100-slide "ferris wheel" type for certain projectors
(mostly no longer manufactured) that push the slides in and pull them out
horizontally.
The auto feeder attachment for the Nikon LS5000 (and the earlier version for
the LS4000) has some well-known problems with jamming until you modify the
opening where the slide goes in, but once I got mine fixed, it only jammed when
the slide going in snagged on the next one in the stack. I scanned 40,000
slides in about 3 months by keeping the thing fed pretty steadily. (That did
not include any cleaning of the slides, so my old Kodachromes need a lot of
spotting to actually use the scans--sometimes it's easier to rescan one than
to clean it up. But for archiving and easy lookup, it was still worth doing.)