All 645 lenses are A lenses and are electronically identical to to the Pentax Ka lens mount. There is no 645 equivalent to a K lens but I would expect that the 67 lenses would fill that niche. Remember Ka lenses are supported by all Pentax K DSLRs but using the aperture ring for full aperture metering isn't.
Thibouille wrote: > If the adapter provides the linkage then 645D should meter normally IMO. > Pentax stated that 645D is compatible with all 645 lenses and the > DFA55 is announced as being compatible with previous 645 bodies (and > it has an aperture ring). > > So it should (hopefully) be OK. > > 2007/2/27, Mark Roberts <[EMAIL PROTECTED]>: > >> P. J. Alling wrote: >> >> >>> Mark Roberts wrote: >>> >>>> Paul Stenquist wrote: >>>> >>>> >>>>> On Feb 27, 2007, at 3:58 AM, Thibouille wrote: >>>>> >>>>> >>>>>> Mmm BTW do 67 lenses provide mecanical coupling when >>>>>> used on 645 with adaptor or one you them like M42 on K body ? >>>>>> >>>>> When used on the current 645, using a 67 lens would be akin to >>>>> using an M42 lens on the Pentax digitals. >>>>> >>>>> >>>> A little better than that: The 67-645 adapter does provide >>>> automatic diaphragm actuation and open aperture metering. At >>>> least according to the Pentax literature. I'd love to buy one of the >>>> things if I could ever find one. >>>> >>>> >>> But will it offer open aperture metering on the 645D? >>> >> Impossible to say without having a 645D to play with, don't you think? >> But I'd be surprised if it didn't. >> >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> >> > > > -- Entropy Seminar: The results of a five yeer studee ntu the sekend lw uf thurmodynamiks aand itz inevibl fxt hon shewb rt nslpn raq liot. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
