Archived posting to the Leica Users Group, 2000/07/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]We are talking about a working tolerance of .015 mm. (approximately .0006 of an inch or one half a thousandth of an inch). I am involved in the repair side of the service industry (automobiles not cameras) and I can assure you that is a very small amount. :-) John Collier > From: CapsTeeth@aol.com > >> jbcollier@home.com writes: >> >> Yes there are tools and procedures to follow. On the Leica M you use a >> special tool to check for the proper distance which involves using "gauge >> set 56". Tolerances are +0.005 mm. to -0.01 mm. The lens mount can be >> machined and then you have to carefully use an auto collimator to check for >> parrallelism. I do not have an "R" manual but expect it is similar. >> > > So then, you've corroborated what I said, that there is no designed-in > adjustment (such as an adjustable plate or shimming) for the seating of the > lensmount. What you're saying, if I understand correctly, is that Leica's > current manufacturing procedures are inconsistent to the point each mount > requires re-machining by hand to achieve the necessary tolerances? When is > your manual dated? I can imagine such a procedure being necessary in the > days of the M3-2-4 but I truly shudder to think if it's still true today, > given the contemporary work ethic, what the likelihood is there's actually > someone at Leica service who actually does it "by the book" : (