On Jun 6, 2011, at 10:25 AM, Richard Ward wrote: > A key component for one of his arguments was manufacturing variability in > both the mount on the lens and the mount on the body. I find this a bit odd. If we're talking about SLR cameras. While the camera and lens mounts may affect the short or long (infinity) focus ends they sure should not affect - "focus" accuracy; which is accomplished by a well aligned mirror and ground glass screen in relationship to the film or sensor plane. Think of placing an extension tube or bellows between the body and lens you should still be able to focus the lens accurately within the range offered by the extension. Regards, George Lottermoser george@xxxxxxxxxxx http://www.imagist.com http://www.imagist.com/blog http://www.linkedin.com/in/imagist ------ Unsubscribe or change to/from Digest Mode at: http://www.lrflex.furnfeather.net/ Archives are at: //www.freelists.org/archives/leicareflex/