Tony Duell wrote:
  That's smaller than the _film_ size I want to
use. Seriously, I have a
 few 5*4" sheet film cameras. Perhaps that's why I don't think digital
 cameras have even marginally useable resolution. 
 Tony, I have a 5*4" enlarger here that's, um, surplus to
 requirements.  I used it a few years ago for 6*7cm enlargements, 
Argh!.. I've just bought such an instrument (I did buy a good one, I
hope, a DeVere 504 with Dichormat Mk4 colour head).
  but I don't have that camera any more.  Do you
want the enlarger? 
Alas I don't think I have space for another one... If you seriously want
to find it a home, let me have details and I'll see what I can do.
-tony