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Thread: Compur shutter with no threads at the back side?

  1. #1

    Join Date
    Sep 2021
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    11

    Compur shutter with no threads at the back side?

    Hello,
    I've got an lens on a old Compur shutter. I'm unable to remove the plate at the shutter backside. I don't see threads.
    Does the back plate fit too tight or is it not intended to be removed? I'd like to use the lens in this shutter on my LF camera using a Linhof lens board. Is there an adapter available?

    Thank you in advance,
    Oliver

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  2. #2

    Join Date
    Nov 2017
    Posts
    490

    Re: Compur shutter with no threads at the back side?

    Looks like a bajonet mount.
    Expert in non-working solutions.

  3. #3

    Re: Compur shutter with no threads at the back side?

    Wouldn't the bayonet be able to come off if you unscrew the rear element? if that's possible of course.

  4. #4

    Join Date
    Sep 2021
    Posts
    11

    Re: Compur shutter with no threads at the back side?

    Quote Originally Posted by RockAndRolf View Post
    Wouldn't the bayonet be able to come off if you unscrew the rear element? if that's possible of course.
    Unfortunately I could not remove the rear element - too tight or not supposed to be unscrewed.

  5. #5

    Re: Compur shutter with no threads at the back side?

    It looks as if it is in fact a bayonet mount which will account for the tightness of the lens element. It could be that the bayonet “plate” is also used as a spacer for the rear element. if you can get the lens to unscrew (it will unscrew), then you will be able to assess the situation and decide what the best next move will be. Finding an adapter to use on a Linhof board is going to be difficult at best so you need to get the rear element off to see whether or not the shutter is altered. You can have a special flange made or make it yourself to use as a spacer. I have done this in the past to fit a lens to a smaller shutter than it was intended. Anyway, good luck with your project.

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