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  1. #1

    Join Date
    Feb 2010
    Shooter
    35mm RF
    Posts
    17

    CZJ 2.8/50 can't remove focus ring!

    I bought it on ebay and the focusing ring was very stiff, so I disassembled it. All good except I can't get these two pieces apart! There are no screws in sight. Anyone has an idea as to how I can separate the two?

    http://xs.to/share-838B_4BE1F9F8.html
    http://xs.to/share-925A_4BE1F9F8.html
    http://xs.to/share-2C08_4BE1F9F8.html

    thank you all

  2. #2
    DWThomas's Avatar
    Join Date
    Jun 2006
    Location
    SE Pennsylvania
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    Multi Format
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    OK, I have zero specific knowledge, so this is just foolish speculation ...

    Is it possible this isn't supposed to come apart? From what I can tell via an LCD screen it looks as though it could be a pressed-in ring with that internal thread. In that case it could be expected to be permanently connected and turn with that outer piece. As it turns, whatever part it mates with would be driven in or out (or drive it in or out).

    My .05¢
    (I'll go back to sleep now ... )

  3. #3

    Join Date
    Feb 2008
    Location
    Winnipeg, Canada
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    From your photo's I can't even tell if it is a different piece of metal. What does it look like from the other side? Does the threaded ring move in the black piece?

  4. #4

    Join Date
    Feb 2010
    Shooter
    35mm RF
    Posts
    17
    the thread moves on the black piece, and it's movement is limited by an inside screw (hidden). my guess is that I'm going to need a lens spanner or some similar tool to unthread the metal thread (it's threaded on a finer thread)



 

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