Archived posting to the Leica Users Group, 1998/10/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I'm new to LUG and have enjoyed reading your various missives. Here's my question. I have an older screw mount Sumicron 90 which I inherited from my grandfather. I use it on my M3 and M6 with an adapter ring. I've noticed that when you try to focus at infinity that the images don't quite line up in the range finder - you can't get them all the way there even though the hyperfocal scale says infinity. Any thoughts? Is it possible that the extra thickness of the adapter ring is causing the problem? If so, wouldn't the same problem hold true at all other distances? My test slides under a 10x loupe look sharp at various distances but I'm not sure if that's just a function of being stopped down and depth of field (the test I just did was at f16. It didn't occur to me to try other f stops). Thanks in advance. Kevin Hoffberg (925) 942-2772 Visit our website at www.inseon.com