Beseler 240 mm lens retaining ring

[jeroldharter]

I have this lens with no retaining ring. I know it is larger than 50 mm but have not been able to find the exact size for the retaining ring/jam nut.

Does anyone know the proper size? Thanks.

 

[jeroldharter]

bump. Anyone out there?

 

[MattKing]

jerold:

The second to last post in the following photonet thread seemsto say 50mm:

http://photo.net/large-format-photography-forum/003E5n

Matt

 

[Anscojohn]

I have this lens with no retaining ring. I know it is larger than 50 mm but have not been able to find the exact size for the retaining ring/jam nut.

Does anyone know the proper size? Thanks.

*******
I have a 210 Rodenstock that is ca 63mm.

 

[ic-racer]

If its a re-branded Rodenstock 240mm f5.6 I think the thread is 72mm.

 

[domaz]

I heard some people say that cheap step-up rings can work as retaining rings. Like a 72mm-82mm something like that. No idea if it works though.