Archived posting to the Leica Users Group, 2002/03/06
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Mark, It is very simple to check. Mount lens, set it to infinity and point the camera at something very far away. If it all lines up, great. If not, it still may be within the DOF of the lens. Yes, I have seen a 40/2 mounted on several M bodies and on one it lined up correctly at infinity but not with the other two. The DOF of the 40/2 probably would have taken up the slack. I guess it all depends on how fussy you are and how often you are focused close and wide open. Many people have said that Leica made it all up to keep people from buying the cheaper 40/2. The lads in Germany may be too fussy for our tastes but they are right about the differences in lens cam design. As I said earlier, try it and see. John Collier > From: Mark Langer <mlanger@ccs.carleton.ca> > > Is this true according to your direct experience, or just from what you've > heard? I'm asking you this because last weekend I had a discussion with > Reinhold Mueller on this very subject, and he answered unequivocally that the > incompatibility of the 40mm > Summicron with other M cameras was just a myth. I'm fond of the 40mm focal > length (I've got an Olympus 40mm f2.8 in LTM and just got a Rollei 35 SE) and > have been considering buying the 40mm Summicron for a M6. > >> From: John Collier <jbcollier@powersurfr.com> >> >> >> The answer is: a CL lens may focus correctly on a M camera...or it may not. >> The CL uses a very steep lens cam and the horizontal position of the CL's >> rangefinder roller is critical. The M lens cam is not steep and horizontal >> position of the rangefinder roller is not critical. In fact, on the M >> camera, the length of the rangefinder arm (horizontal position) is >> adjustable to fine tune focusing accuracy. So it is not unusual to have the >> rangefinder roller in slightly different horizontal positions on different M >> cameras. >> >> So the short story is that a CL lens may line up properly at infinity on one >> M camera and may not on another. Try it and see. >> - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html