OK, thanks. I think someone explained this before, but I didn't get it. Now I understand.
Shel > [Original Message] > From: Lucas Rijnders > schreef Shel Belinkoff > > > I still don't know what an aperture simulator is, > > With pre-A lenses, the lens determines how much it is stopped down. In > order to measure exposure wide open, the body must know how much the lens > will stop down from wide open during the exposure. The aperture simulator > (Bojidar calls it the stop-down coupler) is the body-half of a set of two > connecting pins (the one on the lens is called the stop-down indicator) > made to transmit this information. > > With lenses in A-mode, the body determines how much the lens is stopped > down, so the two pins are not needed. > > Hope this helps, for a more comprehensive explanantion, read the pages on > the K-mount evolution on the KMP. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
