"It's been reported here that the DA lenses generally cover very nearly the image circle required by 35mm film, so perhaps they would be perfect for something like 1.3x. Or, I believe someone talked about 1.2x, too;"
----- Some do, some don't. Speaking only for my own preferences and cognitive limitations...I find it is enough to have to remember two angles-of-view for each of my older lenses. I draw the line at two. Having to remember three exceeds what I would be willing to do. A sensor with a new crop would require a new batch of wide angle lenses, and wide-to-tele zooms. Having got just about what I need for APS-C (except I want a DA* 400), I would be unhappy to have to start buying another new set of lenses. Joe -- 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.