Beseler 240 mm lens retaining ring

jeroldharter

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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.
 

MattKing

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Anscojohn

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jeroldharter said:
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.
Click to expand...
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I have a 210 Rodenstock that is ca 63mm.
 

ic-racer

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If its a re-branded Rodenstock 240mm f5.6 I think the thread is 72mm.
 
Last edited by a moderator:

domaz

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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.
 
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