SilverFast has a
problem with doing an IT8 calibration, at least on a PC. It
gives an error message that says you haven't aligned the frame correctly
around the IT8 target. Ian Lyons says it works OK on his Mac.
working on the problem and asked me to send them a screen grab just
the error message pops up.
The trick is to leave about a 1 mm extra border inside the Silverfast
framing. I was incredibly frustrated with this until I
accidentally figured it out. I
have and use Silverfast on my Nikon LS4000 and Epson 1680 Professional
scanner where it comes bundled. I have only calibrated the Epson
for reflective scanning
as I use the Nikon for slides. However a transparency target is
provided for scanning
4x5 transparencies and that may some day be useful.