Question concerning lens mount

Discussion in 'Adapted Lenses' started by Selten, Nov 10, 2013.

  1. Selten

    Selten TalkEmount Regular

    Oct 22, 2012
    Rhineland, Germany
    Just won a lens with this particular lens mount. I cannot recognize what exactly it is and what adapter it would need! Any suggestion is very appreticated!


  2. CGrimm

    CGrimm New to TalkEmount

    Sep 2, 2013
    Without knowing anymore about the lens aside from these two pictures it would appear to be a screwmount lens, which could be M42, M39 or even a T-mount.
  3. quezra

    quezra TalkEmount Top Veteran

    Aug 22, 2012
    Or even a C-mount...
  4. Selten

    Selten TalkEmount Regular

    Oct 22, 2012
    Rhineland, Germany
    Oh. Did not think to type that - it is a CZ Jena 135mm f/4. I think it could be M42, but not sure. It does not look too typical to my unknowing eyes :/
  5. Gandalf

    Gandalf TalkEmount Regular

    Sep 5, 2013
    You're going to have to *carefully* measure the actual threads on the mount to determine the correct identity. There are/were several threaded lens mounts that are/were so nearly the same that they are almost impossible to distinguish visually.

    The list includes:

    M42 (often called the Pentax screwmount) - 42mm X 1mm

    T-mount - usually 42mm X 0.75mm. The earliest T-mounts were 37mm X 0.75mm. I think there may be others that are also called T-mounts, if things aren't muddy enough.

    M39 (Leica Thread Mount, or LTM) - 39mm X 26tpi (turns per inch.) Soviet-era Russia produced some cameras with a 39mm X 1mm mount, good luck telling the difference.

    The C-mount is much smaller: 1" X 32tpi, so that one is easy.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.