Beseler 240 mm lens retaining ring

Discussion in 'Darkroom Equipment' started by jeroldharter, Feb 22, 2009.

  1. jeroldharter

    jeroldharter Member

    Messages:
    1,961
    Joined:
    Nov 6, 2005
    Location:
    Wisconsin
    Shooter:
    4x5 Format
    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.
     
  2. OP
    OP
    jeroldharter

    jeroldharter Member

    Messages:
    1,961
    Joined:
    Nov 6, 2005
    Location:
    Wisconsin
    Shooter:
    4x5 Format
    bump. Anyone out there?
     
  3. MattKing

    MattKing Subscriber

    Messages:
    21,102
    Joined:
    Apr 24, 2005
    Location:
    Delta, BC, Canada
    Shooter:
    Multi Format
  4. Anscojohn

    Anscojohn Subscriber

    Messages:
    2,723
    Joined:
    Dec 31, 2006
    Shooter:
    Medium Format
    *******
    I have a 210 Rodenstock that is ca 63mm.
     
  5. ic-racer

    ic-racer Member

    Messages:
    8,011
    Joined:
    Feb 25, 2007
    Location:
    Midwest USA
    Shooter:
    Multi Format
    If its a re-branded Rodenstock 240mm f5.6 I think the thread is 72mm.
     
    Last edited by a moderator: Feb 23, 2009
  6. domaz

    domaz Member

    Messages:
    566
    Joined:
    Nov 2, 2007
    Location:
    Tacoma, WA
    Shooter:
    Multi Format
    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.