[pure-silver] Re: Ektanon 135/4.5 retaining ring?

Hello

I just bought an Ektanon 135/4.5 enlarging lens, but I kind of follishly assumed this would be in M39 mount. It now appear to be larger than M42, with a much denser thread. Could this possibly be M44? Anyway, I need to fit the lens on a 4x4 metal plate of a Beseler 45MX enlarger. The hole on the plate is too small to let the thread pass, so some kind of adapter would be required. Alternatively, I could use a retainer ring on some home built 4x4 plate - if only I had this king of ring.

Any idea what's the name of this kind of lens mount? Any idea where I could find either of the items described above? I understand that this is rather ancient stuff and that some eBay hunting might be in order. But it would be easier to find looking for it with its exact name.

Philippe Gauthier

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