Summary: I purchased the Canon flatbed scanner because of its excellent templates for copying negatives of which I have thousands. I also based my purchase on the fact that Canon has a excellen track record for cameras. The unit does an outstanding job copying 35mm color slides as well as 4 x 5 negatives. I am very pleased with the unit.
Summary: I've used this scanner for well over 100 contact-pages of negatives (transparancies) as well as for CD cover art on a Mac G5 running MacOS X and Photoshop. It is not a dedicated film scanner, but it's plenty for my uses. I find the scanner and importing software quite easy to use. The purpose of the importing software is only that; you fix each individual frame in Photoshop or whatever graphic program you prefer after you get the basic data into the computer.
Summary: It took some getting used to, but we have had singular success with this scanner. (I say "we," but my husband, who is an artist, has done all the work.) Slides dating back to the 1960's are in remarkably good shape and convert well to digital photos. Adobe Photoshop cleans up scratches and the occasional blob. It also can remove unwanted details in the photo, making each a true work of art.
Summary: I've had the machine for about a month, and scanned in several hundred 120 negatives and about 1000 slides so far (5 or 6 thousand to go). It takes about 45 minutes to scan in a set of 12 slides, but they come out great. The 'faded' setting on the machine worked good for some slides from the 70s. Dust and scratch setting also makes a big difference. I don't use the 'Autotone' setting - I do that in Photoshop CS and I think it does a better job.
Summary: If you are archiving the family slides or even slides for business, Canon's CanoScan 9950F is without a doubt the scanner for you. At a price that's far below the "slide only" scanners, it gives comparable results plus the benefits of a flat bed scanner. Unlike other flatbeds, however, the Canon can scan up to 12 35mm slides at a time with solid results. I am running this scanner on Windows XP with 1GB of RAM. Also USB2.0 or FireWire is a must.
Summary: I bought this scanner principally to scan colour negatives. I took a 4"x5" negative taken by my photography teacher and scanned it at 4800dpi 48bit. I put the resultant TIFF on a CD, along with the TIFF of the same negative scanned with a $20'000 professional scanner (they charge $70 a scan). My teacher (who didn't know which was which) thought that the Canon scan was crisper and the colours more accurate.
Summary: I bought this mostly to scan a large collection of color slides for use in Powerpoint presentations; it replaced a HP ScanJet 3500 (about which I had no complaints at all, but needed the slide scanning capabilities). I'm running it off an iMac G5 with Mac OS 10.4, scanning through Photoshop CS2, using the USB 2.0 connection (Firewire 400 also possible).
Summary: Really like this scanner. It's a bit on the pricey side for a scanner alone. However, add that it is an excellent film scanner and it's actually a good deal. Negatives are really easy with the software - load a full carrier with 20 to 36 negatives, preview in under a minute, and each shot is placed in it's own thumbnail. Click on which pictures you want scanned, and only those are scanned. Couldn't be easier.
Summary: I recently purchased the 9950F for the specific purpose of scanning 35 mm slides. In the course of three weeks I scanned over 1700 slides with very good results. I found the colors to be excellent and true to the original slide. I scanned at 2400 dpi because I wanted enough resolution to use the pictures for slide shows.
Summary: I have already scanned several thousand prints and slides and couldn't be happier. Compared to my last scanner this is extremely fast and has multiple functions that are easy to use. Being able to scan 12 slides at once was extremely convenient. It takes about 12 times as long to scan 12 slides than 12 prints but you don't have to swap out a slide after every scan. One reviewer had stated he had a problem with dust underneath the glass. I had no such problem.