Re: [Leica] is it possible for one M lens to misfocus?

[S Dimitrov <sld@earthlink.net>]

On this particular model, I've had two bad lenses. The  first had a
helical system that was sloppy and was turned in for salvage, under the
warranty. The second one had a couple of cemented elements separate. One
quick way to check is to see if, when looking trough the rear elements
and tilting the lens side to side, they are concentric circles. But
definitely send it in to the Jersey folks.

Slobodan Dimitrov


shino@ubspainewebber.com wrote:
> 
> i have an m6 and the following lenses: (dates are design year, as per Puts)
>   2.8/21 Elmarit-M 1980
>   2.8/28 Elmarit-M (III) 1979
>   1.4/35 Summilux-M, 1961
>   2.0/90 Summicron-M (III), from 1980
> 
> i used to think the 28 was the sharpest of these lenses, but lately
> i've been surprised to see images made on this lens have looked very
> mushy and soft.  from examining some of these images, i suspect
> that the 28 is focusing well ahead of the rangefinder.  my other
> lenses on the same camera seem fine, even the 90.  if the m6's
> rangefinder were off, i'd expect images on the 90 to be affected the most,
> but my photos with the 90 are pretty well dead-on focus.
> 
> so, is it possible on an M that the focus on one lens is off?  i suppose
> i could give the whole kit over to leitz, but realistically
> that would mean being without the stuff all summer (shudder!).
> 
> any advice to a guy who may need to use an F3 all summer?
> 
> thanks,
> 
> -rei