INA 200mm f4.5 - strange lens

Discussion in 'Adapted Lenses' started by punkman, Feb 14, 2012.

  1. punkman

    punkman Mu-43 Regular

    Dec 30, 2011
    This is a strange lens I got, that won't focus to infinity. It has a removable M42 mount with a "P" marking. I assume that means it's for Pentax M42 not something other mount with threads of the same size.

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    [​IMG]"567" width="756" />

    It won't focus to infinity on my M42 to m4/3 adapter, which I've used with various M42 lenses and they all focus past infinity.

    I removed the M42 mount from the lens, it was held in place with 3 small screws. That shaved off a few mm. I held it with my hand up to the M42 to M4/3 adapter and it still didn't reach infinity.

    A picture taken with this lens.

    <a href="">
    [​IMG]"567" width="756" />

  2. mister_roboto

    mister_roboto Mu-43 Top Veteran

    Jun 14, 2011
    Seattle, WA, USA
    Real Name:
    Vinson is the manufacturer, sometimes as Ina Vinson or Vinson Ina (something like that). They're a Japaneses company in the 60's and 70's that made re-bagged lenses usually from Sankyō Kōki Komura. I *think* that's what you've got.

    It screws into a M42 adapter correctly though? No slack or anything?