Archived posting to the Leica Users Group, 2007/08/28
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Bob, a nice warm pet portrait. The back focus issue is a very interesting one. There is an article in the current (August) LFI which discusses the issue at some length. Leica reports record numbers of lenses being sent for adjustment. The most vulnerable being basically the -luxes. Clearly any error would be most apparent with the very fast lenses. However they have said that the later design of the 50 asph and 75 asph with floating element is meant to be less vulnerable and this may be their future basis for lens designs of that type. Leica suggests that errors that may have been present with film cameras too are perhaps more noticeable with digital capture. Especially now that there is a greater awareness of the issue. I like their one line solution if you get a focus shift. Just shoot the lens wide open all the time! Cheers Hoppy -----Original Message----- Subject: [Leica] IMG: Chelsea At The Door Here is a shot made this evening with my M8 and 75mm Summilux of Chelsea, one of our older Cavaliers (she is ten) at the back door. The 75 just came back from Leica New Jersey, along with my 35mm ASPH Summilux and 50mm pre-ASPH Summilux. I had back-focus issues with these three lenses on my M8 so I sent them in to Robert Fisk and his technicians for 6 bit coding and focus calibration. I think they did a great job. My Noctilux goes in tomorrow. http://www.bobbaron.com/W_L1002843ChelDoor.jpg --Bob _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information