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Thread: Building a AV-Xenotar 150mm 2.8 lens for 4x5

  1. #11

    Re: Building a AV-Xenotar 150mm 2.8 lens for 4x5

    Quote Originally Posted by Xifoideus View Post
    I have made a cardboard aperture around f22 ish. I have tried that in various locations. By complairing the preview on the ground glass I was able to see the best location. Just behind the 4th lens is the optimal spot to place it. Now I know where I have to cut the lens.
    hi, many thanks for the information.
    how the test go forward ? is there any details about the aperture position?
    I got one a few days ago, and like to place an aperture with m58 mounting thread into the lens. hope you can clarify the optimal way to make it clear. thank you very much.

  2. #12

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    Re: Building a AV-Xenotar 150mm 2.8 lens for 4x5

    You should have the aperture as close as possible behind the 4th glass element.
    It's not the most dificult to adapt. But it does not cover 4x5 and is not anything like the Xenotar. But a nice lens anyway.

  3. #13

    Re: Building a AV-Xenotar 150mm 2.8 lens for 4x5

    thank you for your answer. currently, I can't remove the rear element because of the fix ring was stuck very tight. I think it's a good way if I can get some information about the distance from the 4th element to the end edge of the lens body. is it possible ?

  4. #14

    Re: Building a AV-Xenotar 150mm 2.8 lens for 4x5

    because of the rear element cannot be removed (I think it's stuck tightly), I cut 38mm length off from the rear edge and that's the exact position just behind the 4th element. every thing is done for the modification and the result is great, it is really fantastic lens even without an aperture. I am very happy to finish the job and thank you very much for your information. Click image for larger version. 

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  5. #15

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    Re: Building a AV-Xenotar 150mm 2.8 lens for 4x5

    Quote Originally Posted by johnjuang View Post
    Click image for larger version. 

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    Looks realy nice.
    Great job.

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