Overexposure with adapted lenses

Discussion in 'Adapted Lenses' started by scott, Aug 11, 2013.

  1. scott

    scott FujiXspot Rookie

    20
    Jul 2, 2013
    I did a couple of quick tests today to compare my Konica 28/3.5 and Canon 24/2.8 on the X-E1. The raw files were noticeably overexposed -- salvageable, but I need to adjust exposure down a full stop in Silkypix.

    Has anybody else had this problem? Is it a metering-mode problem?
     
  2. Phoenix

    Phoenix Super Moderator Subscribing Member

    797
    Jan 31, 2013
    Melbourne, Australia
    Phoenix
    I don't have the exact type lenses, but I have tried adapting a Minolta 50mm 1.4 and a Voigtlander 35mm 1.2, other than the difference in DOF, sharpness, etc.. The files were pretty much at the same exposure as the native XF 35mm 1.4
     
  3. flysurfer

    flysurfer X-Pert

    Feb 1, 2013
    Nuremberg
    Rico Pfirstinger
    The kind of lens used doesn't affect how the camera meters exposure. Exposure is a function of brightness and camera/user settings such as ISO, aperture, shutter speed and exposure compensation. It even works w/o any lens at all.
     
  4. AlbertInFrance

    AlbertInFrance FujiXspot Regular

    89
    Feb 11, 2013
    Morbihan, France
    Definitely user error, I'd say.

    On my X-E1 I've used legacy glass from Nikon, Pentax, Sigma and Vivitar. Primes and zooms. Even used pinholes. Never found any exposure errors due the lens. As the camera meters through the lens I can't see how any metering methods other than a separate meter or 'sunny 16' could be caused by any theoretical transmission differences.
     
  5. scott

    scott FujiXspot Rookie

    20
    Jul 2, 2013
    I guess I should have specified that I was using aperture-priority exposure with the compensation dial set at zero, so I'm not sure what "user error" could have happened. I understand how exposure and metering work, which is why this struck me as odd enough to be worth asking the question.
     
  6. taz98spin

    taz98spin FujiXspot Top Veteran

    523
    Feb 1, 2013
    New York, NY
    TAZ
    That's strange.. I use aperture-priority with my legacy lenses all the time! & my lenses are faster lenses than what you were using.

    Which metering did you select?
     
  7. scott

    scott FujiXspot Rookie

    20
    Jul 2, 2013
    It's on the "multi" setting.
     
  8. taz98spin

    taz98spin FujiXspot Top Veteran

    523
    Feb 1, 2013
    New York, NY
    TAZ
    That's what I use too!

    Did you check the adaptor to ensure it doesn't have light leakage?
     
  9. scott

    scott FujiXspot Rookie

    20
    Jul 2, 2013
    Not yet, but I can try it. But there's no sign of flare around the edges.

    I'm trying more test pictures to see if this is a consistent problem, or if it was a fluke. I've only done a few so far, but I'm not seeing a consistent one-stop overexposure yet.
     
  10. taz98spin

    taz98spin FujiXspot Top Veteran

    523
    Feb 1, 2013
    New York, NY
    TAZ
    Good luck with your testing, and hopefully it was just a fluke!
     
  11. Bob Brandoff

    Bob Brandoff FujiXspot Regular

    124
    Jan 5, 2014
    This is not a problem of exposure, but rather lens coating -or- lack thereof. My favorite Russian & E. German Soviet Era lenses also exhibit the same tendencies, but it's correctable. Lock in on a darker portion of the composition- then recompose... that and RAW manipulation fixes it.

    Here's a shot with the Russian Jupiter 9 f2/85mm SONNAR copy M42 universal mount:

    km04.