Beseler HD 240 mm enlarging lens filter threads

[jeroldharter]

I have one of these lenses. I believe it is the same as a Rodenstock Apo-Gerogon.

Hard to find literature on either. Does anybody know what filter size this lens takes? Thanks.

[vinny]

Jerold, it's actually a Apo Geronar your dealing with, if that helps. I bet Bob Solomen would know.

[jeroldharter]

I figured it out: 52 mm