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Thread: Sony A7 Fotga adapter vignetting

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    Sony A7 Fotga adapter vignetting

    Just ordered a Fotga adapter from ebay just did a bit of testing and am getting lots of vignetting. This was shot with Minolta MD 28 2.8 @ 2.8 with no hood.



    Is this a camera, adapter or lens issue? Are there any tests that I can do to isolate the issue. Aside from the vignetting, the adapter seems to be ok, it mounts solidly, focus is pretty good although it goes a bit beyond infinity.
    I also notice slight vignetting with my Minolta MD 100 2.5 as well.

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    Re: Sony A7 Fotga adapter vignetting

    This is from the MD 100 2.5 @ 2.5 with proper hood fitted

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    Re: Sony A7 Fotga adapter vignetting

    Were these at full aperture? If stopping down improves them, I'd venture to say it's the lens. If not, I'd guess the adapter.

    The longer lens would normally show less vignetting than the WA. But both are easily corrected.

    Bill

    PS, I see they were shot wide open, so I suggest you try some f5.6/f8 shots.

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    Re: Sony A7 Fotga adapter vignetting

    I once bought a Fotga adapter and it did not even fit. Pure crap but very cheap.

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    Re: Sony A7 Fotga adapter vignetting

    Odds are it was made for a Nex.

    Paul

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    Re: Sony A7 Fotga adapter vignetting

    I have a number of Fotga adapters and they all do FF just fine. (FD/NiKon/M/LTM/M42).

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    Re: Sony A7 Fotga adapter vignetting

    Quote Originally Posted by camping View Post
    Odds are it was made for a Nex.

    Paul
    I was wondering if that was the case and the tolerances would be different for nex vs ff...
    Last edited by scooter; 12th April 2014 at 21:27. Reason: Typo

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    Re: Sony A7 Fotga adapter vignetting

    Quote Originally Posted by neelin View Post
    I have a number of Fotga adapters and they all do FF just fine. (FD/NiKon/M/LTM/M42).
    Back to square one...

    Any other ideas? Could there be something wrong with the camera? Although I have had no issues with the sony 35 2.8

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