Charles, Pentax makes a variety of film format cameras. The *ist D is a 35mm film format camera, even though no film is involved. It uses Pentax K mount, 35mm format lenses. (think 24mm x 36mm film) In a pinch, with a $10 adapter, the Pentax screwmount 35mm format lenses can be mounted.
Pentax also makes a 645 camera and a 67 format camera. (think 120 or 220 film) These are much bigger film cameras with bigger lenses. Exposed film is nominally 6cm x 4.5cm or 6cm x 7 cm. You can buy adaptors for $100-200 (if you can find them) to mount these on K mount cameras. So, such lenses are not an easy fit for a camera like your *ist D. Regards, Bob S. On Nov 29, 2007 5:11 AM, Charles Wilson <[EMAIL PROTECTED]> wrote: > Can anyone tell me what the designation (645) means after a lens. Will this > lens fit on my digital ist D. > > Regards > > > Charles Wilson > Sydney Australia > > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
