Rodagon 150 flange threads

[Murray]

I have a Rodenstock Rodagon 150 enlarging lens with no retaining ring or mounting flange (so I don't know what was there).

Is that a standard thread, and easily found? I don't relish paying more for a new flange than the lenses go for these days. There are other options, but I think this is common enough there might be an easy answer.

Thanks

Murray

[Geary Lyons]

If yours is the same as mine, (manufactured in the last 10 years), the thread is 50MM.
Depending on the enlarger, fairly common.

Cheers,
Geary