From Cotty: >I'm here. > >Pentax K register distance is 45.46mm >Canon FD register distance is 42mm > >This means that to alter an FD lens to fit a K mount camera (without >using an adapter containing an optical element to correct for infinity >focus) you would have to remove over 3 and a half mil from the back of >the FD lens flange. If you're going to use a 42mm threaded adapter, then >add the thickness of the adapter to that. Might be problems in that >there's not enough room on the back of the FD lens before problems start >in terms of aperture ring etc. You may or may not have problems with the >rear element of the lens not clearing the mirror. I don't have an FD to >look at, but where there's a will, there's a way. > >I have some links on the bottom of this page that might be of further >interest: > ><<http://www.cottysnaps.com/snaps/mods/details.html>http://www.cottysnaps.com/snaps/mods/details.html> > >It's a big job but as an engineering exercise, viable, if expensive. Of >course, as a hobbyist, cost is not justifiable so go to it!
I had a mode in mind that's more basic and only a trade-off in effort. How if I just modify the stops inside the lens mechanism and move the glass back. The scale isn't really important. And after all, it's only a Canon lens. :) Sincerely, Collin Brendemuehl http://www.brendemuehl.net http://evangelicalperspective.blogspot.com http://philosophyforchristians.blogspot.com "He is no fool who gives what he cannot keep to gain what he cannot lose" -- Jim Elliott -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
