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Thread: Copal 0 lens repair question - index ring turns?

  1. #1

    Join Date
    Feb 2001
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    Los Angeles
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    2,238

    Copal 0 lens repair question - index ring turns?

    I picked up a new (used) lens with a Copal 0 shutter. The lens runs fine at all speeds, but when you turn the silver cam ring to change shutter speeds, the black ring with the marked speeds follows it along. I don't see what is supposed to prevent the shutter speed ring from turning. It has a small detent on the back, but this doesn't appear to line up with anything. Just tightening the chrome lock ring in the middle doesn't hold it in place.

    I've looked at some on line reassembly videos, which are quite good, but this step is skipped over.

    Thanks for any help.

    Kevin

  2. #2
    Photographer
    Join Date
    Feb 2001
    Location
    Pine Junction, CO
    Posts
    791

    Re: Copal 0 lens repair question - index ring turns?

    I think you have the opposite problem from the one reported here:

    https://www.largeformatphotography.i...+copal+shutter

    Go to post 6 for instructions on how to adjust the tension on the speed ring.

    Let us know if this solves your problem.
    Keith Pitman

  3. #3

    Join Date
    Feb 2001
    Location
    Los Angeles
    Posts
    2,238

    Re: Copal 0 lens repair question - index ring turns?

    Different issue. The scalloped lock ring, as he calls it, will stiffen things up, but if the chrome cam ring moves to change shutter speeds, the index ring with the numbers still moves with it. But thanks for the suggestion.

  4. #4

    Join Date
    Dec 2000
    Location
    Tonopah, Nevada, USA
    Posts
    6,199

    Re: Copal 0 lens repair question - index ring turns?

    There should be a shaft that sticks up and engages a boss on the verso of the black area that holds it.
    He is no fool who gives what he cannot keep..to gain that which he cannot lose. Jim Elliot, 1949

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