Fujitsu, I know that page and have read this comment before I got the scanner. But I found a refurbished unit on German (!) eBay for a reasonable price with SilverFast Studio (I think) and calibration targets. While it is not perfect it does a very nice job - especially for 4x5. I consider getting the VueScan now as neither SilverFast now the Microtek scanning software allow for hardware adjustment of the lamp brightness.
Sure - for 35mm it is way too slow (like 1 hour for 24 34x36mm scans at 2400 spi) , but acceptable for 6x6 and nice for 4x5.
My only option for 4x5 are scans for about 7 euro done with Imacon X5. Surely the Imacon delivers superior quality but I also wanted to scan images I knew I would not print large or just want to put them on the web (also true for many 120 films I had).
This scanner is also quite loud and I find the SilverFast software quite crappy (layout, speed, operation, stability) but that is probably the best there is in this class.
Ta hardware (safe for the operation noise) seem quite strong. I also find the holders rather well done - I have rarely problem with the 4x5 film sagging and never with 120 strips.
Little advice with BW negs and Microtek F1 - try to scan them as color positives and convert in PS - much more shadow detail.
Enlarging the original 4 - 5 times yields nice prints when done carefully. I have printed
THIS photo to 50x70 cm - and it makes for very nice poster. Sure from 10 inches it is not 10/10, but still quite good.