Mounted slides can be scanned and also projected or looked at in a viewer.
__________________ "Payasam" means a sloppy pudding. Little kids love it, and I'm a little kid with a big grey beard and diabetes. Film: M6, M2, Ultron 35/1.7, M-Hexanon 50/2,Elmarit 90/2.8, Hektor 135/4.5, Canon 100/3.5, Jupiter 8 Digital: Olympus E-300, E-510 and E-3 with 4 Zuiko Digital lenses RFF gallery Flickr gallery
I use film (i.e., non-flatbed) scanners & scan my slides unmounted. Unmounted slides tend to have fewer problems w/film flatness in my scanners (Nikon LS 5000 & Minolta Scan Multi Pro), but the advantage is pretty minimal (it may be a bigger factor when using a professional scanner like an Imacon or drum scanner). My main reason for leaving slides unmounted is that since I shoot mostly negative film, I find it easier to fit unmounted slides into my existing organizational scheme (film cut, sleeved, & stored in binders--mounted slides can also be stored in sleeves but take up more space). You also get a little more image area from unmounted slides.
However, I will never project my slides, @ least traditionally via a slide projector, & that may be an important consideration for you if you do plan on projecting yours.
Five a Second. Chicago's Bell & Howell Co. (cameras) announced that it would put on sale this fall the world's most expensive still camera. Its "Foton" will take five 35-mm. pictures a second, sell for $700. Bell & Howell, which has found that "families of both low and high incomes now spend over $550" for movie equipment, hopes to sell 20,000 Fotons a year.