Archived posting to the Leica Users Group, 2005/06/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I think that the late Schneider's have a proprietary diaphragm design that is mean to diminish the problem with focus shift. My 40mm Focotar was serviced by Focal Point some time ago, but I failed to tell John to use ultra light lubricant on the diaphragm sleeve. That, more or less, is determining my caution with the lens. Slobodan Dimitrov Studio G-8, AGCC http://sdimitrovphoto.com On Jun 15, 2005, at 5:18 PM, Feli wrote: > > On Jun 15, 2005, at 4:50 PM, Henning Wulff wrote: > > >> Unless a lens is absolutely proven to have no focus shift, I focus >> at the working aperture with a good grain focusser. >> > > > See that's exactly what has me rethinking my methodology. I focus > wide open, > stop down and the grain in the print is not as sharp as I would > expect it to be. > I'm using a good lens, a Schneider Rodagon 2.8/50, but I'm starting > to suspect that > there may be a certain amount of focus shift at work. Just goes to > show you, you shouldn't > believe everything you learned in school... ;-) > > feli > > > ________________________________________________________ > feli2@earthlink.net 2 + 2 = 4 > www.elanphotos.com > > > no archive > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >