Quote Originally Posted by OMU View Post
Hello, I have a Heliar 36cm f 4,5.
I want to order a flange to this lens. Unfortunately I’m not a mechanic... can anybody tell me how I can find the correct diameter and TPI for this lens.
Thanks!

Best regards
OMU
I had a 360mm Heliar briefly a few years ago and visited a local machine shop to have a flange made for my specific lens board.

I found someone who would do the work after-hours on his own schedule, so he charged a reasonable price.

I brought the lens and board and left them with him. No problem.

Another option is some custom machining from SK Grimes.