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Thread: Copal 3 Shutter Anomaly?

  1. #1
    Photographer
    Join Date
    Feb 2001
    Location
    Pine Junction, CO
    Posts
    791

    Copal 3 Shutter Anomaly?

    According to the information on the SK Grimes website, Copal 3 shutters have a mounting thread of 62mm, and Copal 3S shutters have a mounting thread of 61mm. I have a lens in a shutter that is marked “Copal 3” that has a mounting thread of 60mm. The lens is a 210 Angulon and the serial number dates it to 1965. Has anyone else encountered a Copal 3 with this smaller mounting thread?
    Keith Pitman

  2. #2

    Join Date
    Sep 2008
    Posts
    50

    Re: Copal 3 Shutter Anomaly?

    Keith there are several different versions of Copal 3 shutters. See this post:
    https://www.largeformatphotography.i...Copal+Varriant
    I hope that post helps. If you are purchasing a Copal 3 shutter and its not obvious which Copal 3 it is you should ask the seller for specific dimensions.
    I learned that lesson several times.

  3. #3
    Les
    Join Date
    Dec 2011
    Location
    Seattle, WA
    Posts
    1,045

    Re: Copal 3 Shutter Anomaly?

    I agree with OKAROB....the different Copal 3 versions didn't drive me to drinking, but there was frustration when I tried to install a ring to hold the lens from the rear. Epay had some rings that supposed to fit, but it got to the point, that I had to get a local machinist to make the appropriate fit. This was "conventional" Copal 3 and not the 3s. Just saying....

    Les

  4. #4

    Join Date
    Aug 2015
    Location
    Bellingham, WA (displaced Canadian)
    Posts
    383

    Re: Copal 3 Shutter Anomaly?

    Quote Originally Posted by Keith Pitman View Post
    According to the information on the SK Grimes website, Copal 3 shutters have a mounting thread of 62mm, and Copal 3S shutters have a mounting thread of 61mm. I have a lens in a shutter that is marked “Copal 3” that has a mounting thread of 60mm. The lens is a 210 Angulon and the serial number dates it to 1965. Has anyone else encountered a Copal 3 with this smaller mounting thread?
    If it's like my Angulon 210 in a Compur Electronic #3, then it has a threaded brass conversion tube splitting the difference between its originally-designed-for-Compound-3 threads and the threading of the Copal #3.

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