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No, there is insufficient resolution to even scan slides, let alone negatives. This scanner probably has, at max a 1200 DPI optical resolution. Note:http://www.image-acquire.com/scanner/html/epp1200s.shtmlIf one wishes to scan 4x5 slides, 1200 becomes feasible. But 35mm will not really work with a DPI resolution as low as 1200. >>
You are right that this scanner (and any flatbed scanner with transparency adapter) is inadequate for slide/film scanning. But the reasons you give are totally wrong.
The resolution is just as adequate for both formats. The only impact the resolution has is on the size of the enlargements you can make. Considering you never print at more than 300dpi, 1200 dpi scanning resolution will give you enough to print a very good 4x6 out of both a slide and a negative (approx. a 4 times enlargement).
The REAL problem with these scanners is the lack of dynamic range. And this is where SLIDES will suffer much more than film!! The lack of dynamic range will be seen in the lack of details in shadowed areas. On film, this translates into the lighted areas which, anyway, don't contain as much detail to begin with. I have a flatbed scanner which is largely inadequate for slide scanning, but is almost decent for film. Of course, provided I am not trying to print more than 4x6.
A very good place for anyone interested in understanding the basics (but also some of the more advanced aspects) of scanning (film/slide especially) is
www.scantips.com
Unfortunately film/slide scanners don't come cheap...