answers: 5

  1. Valery
    15.09.2020

    I have a couple of these, it is better not to disassemble, then you will not adjust,

    Reply

  2. Trueash
    15.09.2020

    "I'm talking a lot" (c), but the picture is really nice

    Reply

  3. Dmitriy
    15.09.2020

    It is a very positive practice, which many "testers" adhere to when uploading RAW test files, as they show all the features of the lens much better. It would not be bad to make this mandatory.

    Reply

  4. Nicholas
    03.11.2021

    If, when the diaphragm changes, the first lens unit rotates along the thread, then the longitudinal gap between the front and rear lens units is violated ??? This is already a "creative" lens.
    In mine, I inserted a turned diaphragm from the I-50 and through a groove in the body brought its control to the bushing with the name (I have this version of PENTAKTA 2,8 / 30). When changing the aperture, the lenses do not rotate, centering and longitudinal clearances are not violated. I measured the relative aperture, at open 2,2 it falls short of two.

    Reply

    • Rodion
      16.12.2021

      The first lens unit in my design does not rotate by aperture. The decorative part rotates.

      Reply

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