Hello All,
I own the latest Microtek F2 model, sister model to the M2. I have owned this scanner since August of last year, shortly after it came out on the market. Previous to that I owned and still have the Microtek M1 scanner. in comparison between the two I would have to say that the that the new F2 is much quieter, especially when it's going through the auto focus stage, the scans are faster than the M1 and the initial powering on is much faster too. As for sharpness of the scans I found that there was not a whole lot of difference when I scanned the same 35mm Kodachrome slide between the two scanners, slightly better with the new F2 scanner.I found though that when I scanned my 4 x 5 black and white negatives ( T-Max 400 ) that the overall sharpness from edge to edge was much better and pleasing with the new F2 scanner. A few years ago I did a test with a friend and photographer who owns a Epson V750, we didn't see a huge amount of difference in terms of sharpness between the two ( M1 vs V750 ), admittedly the V750 did showed better sharpness @ 100%, but not by a whole lot, by the time one makes reasonable sized prints that difference evaporates. The auto focus works well on F2 scanner, with the M1 it sometimes mis-focused, I have not done enough scans with the F2 to determine if the same mis-focus issue happens, I would usually re-scan again and it would be fine.
I hope that info helps.
Gary