Archived posting to the Leica Users Group, 2007/03/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Possible, yes, but a slight misalignment would probably not have much practical effect when using a 50 mm. A 135 mm focused to eighty feet is a different matter. John Collier On 19-Mar-07, at 8:40 PM, Jim Nichols wrote: > John, > > I agree that the lens performance at infinity is not changed by the > adjustment. However, it is possible that the rangefinder's > coincident image may not agree absolutely with the lens distance > scale at infinity. Is this not correct? > > Jim Nichols > Tullahoma, TN USA > ----- Original Message ----- From: "John Collier" <jbcollier@shaw.ca> > To: "Leica Users Group" <lug@leica-users.org> > Sent: Monday, March 19, 2007 9:22 PM > Subject: Re: [Leica] IMG: Focus, Noctilux, M8, C Mode & Scotch > > >> Adjusting the rangefinder does not change the lens's performance >> at infinity the slightest smidgeon. The rangefinder's superimposed >> image may not line up but that won't show in the photos. >> >> John Collier >> >> On 19-Mar-07, at 5:32 PM, Robert Rose wrote: >> >>> Can't be sure yet that other lenses are unaffected. I added two >>> near focus >>> images to the gallery to show that the Noctilux is in tip top >>> shape now: >>> >>> http://gallery.leica-users.org/v/rjrose/focus/ >>> >>> I will add an infinity photo when the haze clears and I can see some >>> mountains! >>> >>> Here is why I am not sure about the other lenses yet. I think >>> that near >>> focus issues are attenuated due to focal length or aperture on >>> my TE (f/4), >>> 90 Elmarit (f/2.8), 135 Apo-Telyt (F/3.4), 28 Summicron-M (f/2 >>> but wide >>> angle). They all seem okay at both near and infinity. >>> >>> I am suspicious about the 50 Summicron at near focus, but I need >>> to do some >>> checking on that lens, and I ran out of time. Sorry. >>> >>> >>> From: Jim Nichols >>> >>> Do I understand correctly that the very small cam adjustment >>> that you made >>> corrected the Noctilux problems without spoiling the adjustment >>> for other >>> lenses? >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information