How to shim LTM lense ( Nikkor 50/1.4)
I have a Nikkor 50 1.4 LTM and after I sent it for collimation, it is now back focusing. Infinity seems to be fine and at 1 M, it is back focused for about 2 inches. I checked the lens in R-D1 and M4 and the back focusing is consistent.
I contacted the camera repairman and he said that it should not be changed as it was set correctly.
I trust my camera body and off I went to borrow a lens spanner. I opened up the lens and found a copper ring shim. ( I was lucky enough to be able to put it back together).
My question is by how much I much add to the shim and how to add additonal thickness to it?