Summary: I have a huge collection of transparencies and negatives that are in all formats; 35mm to 8x10 as well as prints. The ScanMaker i800 does a very good job handling most of the sizes. For 35mm I would use a separate scanner just for that size. The i800 is unusually slow although the new Microtek Scan Potter software improves the speed somewhat. The quality of the scans is very good and with some tweaking in Photoshop can produce more than acceptable files for publication.
Summary: I purchased the Microtek ScanMaker i800 flatbed scanner over a year ago and am well pleased with it. The main reason for purchase was that this scanner would scan negative and positive films up to 8 by 12 in in size, which it does very well. It does have a fairly high learning curve due of all the features/settings available for each scan. The only minor negative item is the fact that it is quite slow, as it has to calibrate itself for each scan.
Summary: Recently I acquired the medium format (120) film negatives from my wedding photographer. After researching many different brands and features, I came to the conclusion that this was probably the best film scanner for the money. Today, after scanning over 300 negatives in my spare time over the past month, I am still very happy with the scanner.
Summary: I bought this scanner to replace an old and unsupported Umax model that would not work at all with Windows Vista, and decided on this model after comparing prices and features, and I'm glad I did. One thing to note -- this thing weighs quite a bit, so make sure you have a large, sturdy surface to put it on. Installation was almost flawless. The CDs that came in the package had older drivers, so I downloaded the latest versions from the Microtek website.
Summary: this scanner has a multipass set up that make great scans but slows down the scanning by half for each pass it max out at 16 lines and i have had 1 scan take a hour to do but it was a great scan