On Oct 21, 2006, at 1:40 PM, William Robb wrote: >> This is just silly. If Pentax redesigns the mount, it will be >> because >> APS is truly here to stay. If it is the registration distance will >> change to simplify lens design. A wider throat would make for larger >> lenses. It makes no sense based on the current, (and past >> successful), >> marketing strategies. But hey what do I know. Aren't you the guy >> who's >> always talking about retro focus designs being a problem? > > Good point. It makes more sense to move the registration distance > back, > thereby allowing a K mount to be used via a short extension tube. > The throat could even be somewhat smaller than a K mount. > This gives some nice possibilities, in that the present lenses could > still be supported via an electro mechanical coupler in the adptor.
According to my lens designer friends, the mount diameter for the K- mount is just fine for a 16x24mm sensor, it's a bit tight for anything larger. Something smaller is likely not as desirable. The registration distance could be 5mm shorter as that has plenty of room for the mirror required and provides more room at the rear of the lens design for light-path correcting elements. Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
