>>I now know that this is due to the CIS being used instead of cold
cathode - in other words<<
Maybe I am the one who is wrong, but wouldn't you be referring to CMOS vs.
CCD? From what I have read, CCD technology does allow a "relatively" larger
depth of field. Epson uses CCD but I don't know about the Canon models you
describe. If you are talking about artwork with "3D-ness" to it (like
sculpture or carving), I don't think a scanner will be your best option
given your stated needs.
Doug
--
Doug's "MF Film Holder" for batch scanning "strips" of 120/220 medium format
film:
http://home.earthlink.net/~dougfishe...lderintro.html