You need 1:2 magnification (fitting an ~24x36mm slide onto an ~18x24mm digital format). A Pentax-A 50mm f/2.8 Macro lens does this very nicely, without extension tubes. I use a flat panel light box and a copy stand to hold the camera in alignment.
Of course, you don't get results quite the equal of a film scanner, although it's faster. After all, you get about a 6Mpixel image rather than, say, a 10.2 Mpixel image (2820 ppi) or 21.43 Mpixel (4000 ppi). I use this method to scan Minox subminiature negatives however, where a 4000 ppi film scanner returns 2.18 Mpixels and the Pentax DS with macro lens + 2x teleconverter + extension tube setup nets 5Mpixel. Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
