Where do I get large retaining rings?

Discussion in 'Large Format Cameras and Accessories' started by jcc, Aug 4, 2013.

  1. jcc

    jcc Member

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    Does anyone have any leads as to where I can get a 80mm/0.75 retaining ring, for an Industar 37 300mm f/4.5 lens? I've googled different combinations of words and can't find a vendor. Does something like this have to be CNC machined?
     
  2. AgX

    AgX Member

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    One does not need a CNC machine to make a retainingh ring. Any lathe added by a simple drill would be sufficient.
     
  3. Alan Gales

    Alan Gales Member

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    Have you tried S.K. Grimes? They make flanges and retaining rings.
     
  4. Ian Grant

    Ian Grant Subscriber

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    Look for a lens flange, they areen't the same as a retaining ring and screw to the lens board itself.

    Ian
     
  5. AgX

    AgX Member

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    Are flanges more eays to obtain than retaining rings?
     
  6. Ian Grant

    Ian Grant Subscriber

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    In larger sizes retaining rings are rare and probably not strong enough for the weight of some large heavy lenses so flanges are used instead.

    Ian
     
  7. AgX

    AgX Member

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    I see your point. I did not consider a mechanical issue. Yes, flanges can be advantageous, though the effect depends on the material of the lensboard.
     
  8. Ian Grant

    Ian Grant Subscriber

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    The Industar 300mm f4.5 lens should have a flange, that's what they normal sell with.

    Ian
     
  9. jcc

    jcc Member

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    That's it, a flange! Excuse my limited vocabulary on the subject. I meant flange.