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Thread: Stuck lens whenever on large Derogy

  1. #1

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    Stuck lens whenever on large Derogy

    Hi everyone, I have this really big Derogy Aplanat (26" FL) that can be disassembled, except for the front element. I'm guessing that the whole ring (sometimes we see these painted black) behind the hood mount should come off? Does anyone have a similar model of which they can take a pic?

    I got the hood of using this PB Blaster spray which worked really easily but I can't get this element or for the life of me! Click image for larger version. 

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  2. #2

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    Re: Stuck lens whenever on large Derogy

    Click image for larger version. 

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  3. #3

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    Re: Stuck lens whenever on large Derogy

    Click image for larger version. 

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  4. #4
    Tin Can's Avatar
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    Re: Stuck lens whenever on large Derogy

    Why not clean in place and let sleeping dogs...
    2022

  5. #5

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    Re: Stuck lens whenever on large Derogy

    Because it has no finish and I want to lacquer it.

  6. #6
    Foamer
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    Oct 2010
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    South Dakota
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    Re: Stuck lens whenever on large Derogy

    Did you try a strap wrench on it?


    Kent in SD
    Qui sedes ad dexteram Patris,
    miserere nobis.

  7. #7

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    Re: Stuck lens whenever on large Derogy

    No, not yet. Headed to the hardware store today and will pick up a hose clamp, based on something I read elsewhere in this forum.

  8. #8

    Join Date
    Jul 2001
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    San Francisco, CA
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    Re: Stuck lens whenever on large Derogy

    I have a No. 6. Both groups unscrew from the barrel. Mine is missing the hood, I suspect it was lost long ago. Oh, I should add my lens also has traces of black paint on the front.

  9. #9
    Tin Can's Avatar
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    Dec 2011
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    15,375

    Re: Stuck lens whenever on large Derogy

    I have used hose clamps and strap wrenches in all kinds of ways

    Professionally!

    They both have a non flexible disaster zone which places stress on anything round

    Oil filters crumple...

    Good luck


    Quote Originally Posted by Petzval Paul View Post
    No, not yet. Headed to the hardware store today and will pick up a hose clamp, based on something I read elsewhere in this forum.
    2022

  10. #10

    Join Date
    Jan 2008
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    Re: Stuck lens whenever on large Derogy

    No, not yet. Headed to the hardware store today and will pick up a hose clamp, based on something I read elsewhere in this forum.

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