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Thread: is there work arounds for missing retaining rings?

  1. #1
    Lascassas, TN
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    is there work arounds for missing retaining rings?

    I have a Kodak Enlarging Ektanon f4.5 10 inch lens that that is missing mounting flange.
    Is there any low cost work arounds for missing lens retaining rings?
    Bill Kumpf

  2. #2

    Join Date
    Dec 2018
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    Re: is there work arounds for missing retaining rings?

    Are you planning on using it on a camera or enlarger?
    If camera, used horizontally, you might be able to use hot-melt glue, or black silicone to make a bead around the threads inside of the lensboard.
    Vertically....no ideas.

  3. #3

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    Re: is there work arounds for missing retaining rings?

    I currently have and use 4 lenses mounted to their lens boards with hot glue. These 4 optics I use very, very infrequently and the cost for someone to machine retaining rings or flanges is just not going to happen. I made sure to apply the hot glue to the threads on the lenses for additional holding power. Hot glue is not opaque, so if the hot glue transmits some light, black paint is an easy solution.

  4. #4

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    Re: is there work arounds for missing retaining rings?

    You might want to check with Luland (luland66 on eBay). They have retaining rings listed, but most appear to be for Copal size shutters. Maybe they could custom make what you need?

  5. #5
    Mark Sawyer's Avatar
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    Re: is there work arounds for missing retaining rings?

    Re: is there work arounds for missing retaining rings?

    Yes. Instead of a missing retaining ring, many of us have missing flanges.
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

  6. #6
    Mark Sawyer's Avatar
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    Re: is there work arounds for missing retaining rings?

    If enough of the lens protrudes behind the lensboard, a ring clamp and soft rubber gasket will hold it securely and without damage.
    Attached Thumbnails Attached Thumbnails IMG_6091.jpg  
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

  7. #7
    multi format
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    Re: is there work arounds for missing retaining rings?

    I think SK Grimes will fabricate flanges / retaining rings...

  8. #8

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    Re: is there work arounds for missing retaining rings?

    Quote Originally Posted by jnantz View Post
    I think SK Grimes will fabricate flanges / retaining rings...
    Not worth it to do that for the lens in question, but it would still be nice to allow these lenses to be usable..

  9. #9

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    Re: is there work arounds for missing retaining rings?

    How large in diameter is the lense?
    Check out the plumbing desk at a real hardware store.
    The rubber gasket used between a toilet bowl and tank might make a tight fit around the lens and the flat side should make a tight press fit against the lens board, all depending on the diameter of your lens.
    "I would feel more optimistic about a bright future for men if he spent less time proving that he can outwit Nature and more time tasting her sweetness and respecting her seniority"---EB White

  10. #10

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    Re: is there work arounds for missing retaining rings?

    If using a wood lens board you can cut it very close and thread the lens into it as if it were machined for the job.
    "My forumla for successful printing remains ordinary chemicals, an ordinary enlarger, music, a bottle of scotch - and stubbornness." W. Eugene Smith

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