Archived posting to the Leica Users Group, 2007/04/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]So, since I have a 35 1.4 ASPH Summilux and a Noctilux, I guess I should send all both to Leica with the M8 at the same time so that correcting the Noctilux issue does not throw the Summilux out of whack. Is this correct? Clive http://www.clive.moss.net/blog/ on 4/1/2007 12:57 PM Leonard Taupier said the following: > From what I can see the current Noctilux is the biggest problem. It is > made worse by a focus shift that occurs with this lens between f2 and > f2.8. The focus shift causes a more pronounced back focus condition then > at f1. The shift remains up to f5.6 or so but begins to be masked by the > DOF. I have seen the same problem with my film M's but not to the extent > of the M8. I have seen the same type of shift with the 50/1.4 Summilux > but it generally stays in focus but barely. The APO 90/2 ASPH will also > back focus. > > The hex adjustment to the rangefinder cam is not really a fix for this > problem. That cam adjustment is the infinity adjustment for the Leica > rangefinder. It does pull in the backfocus problem of the Noctilux but > will also throw off the infinity focus of the long lenses. The best fix > for these problems is to do what Tina did. Send Leica the lens and body. > > Len > ...