Archived posting to the Leica Users Group, 2006/11/06
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hoppy's correct; the back focus is longer in an M42 lens (45.5mm) that for a Leica, whether an M or a 39mm LTM (27.8 mm). Theoretically you could design a mount that moves the lens forward of the camera. The real problem is that without seriously modifying the design of this lens the mount throat cannot fit the rear element. This could be remedied when moving the back element forward to compensate for the back-focus issue, but you'd end up with a pretty strange lens that was much larger (particularly length-wise) than it needed to be. The Contax 50/1.7 is the winner of the bad-bokeh competition, not the 1.4, though the 50/1.4 can get pretty ugly in its out-of-focus rendition at times. -- Search for products and services at: http://search.mail.com