Shimming a Komura 35mm 2.8

[stompyq]

Any pointers and how to do this? I used paper wedges as a temporary solution to see if i can solve the back focus issue with my Komura. It worked fairly well and i'am only back focusing a few inches and not 50 feet.

[Brian Sweeney]

I've not taken one apart, I suspect you have. Sounds like the helical could have been misassembled- I had a Canon 35/1.8 with that problem.

Feel free to post pictures on this thread.

some questions:

1) How thick of a wedge did you use.? Would have to be 2mm or greater for a 50ft back-focus?
2) Will it focus to Infinity with the wedges?

to correct for a few inches, I use copper tape. For a big back-focus, I use a split retaining ring from an old parts lens. Like a namering. I also got a pipe cutter, and some aluminum. Cut the pipe, pilish the shim.