Lens aperture clicks help!

Discussion in 'Camera Building, Repairs & Modification' started by EKDobbs, Jun 8, 2012.

  1. EKDobbs

    EKDobbs Member

    Messages:
    124
    Joined:
    Jan 29, 2012
    Location:
    NC
    Shooter:
    Multi Format
    I just took apart the back of a sigma 24mm 2.8 filtermatic (minolta mount) for no reason other than I wanted to. I can put it back together such that it mounts, but the apertures no longer click at the stops, and the auto-coupling spring pulls the aperture ring back if you put it above f/5.6.

    Help?
     
  2. Newt_on_Swings

    Newt_on_Swings Member

    Messages:
    2,131
    Joined:
    Mar 30, 2011
    Location:
    NYC
    Shooter:
    Multi Format
    You may have dropped the small ball bearing that presses against the aperture ring. It's usually just free floating backed by a sheet metal spring for tension against the body.
     
  3. EKDobbs

    EKDobbs Member

    Messages:
    124
    Joined:
    Jan 29, 2012
    Location:
    NC
    Shooter:
    Multi Format
    Did just that. Thankfully I had a crappy quantaray 70-210 lying around, cannibalized it for the ball bearing. The clicks are a little softer, but it's no longer broken.
     
  4. Newt_on_Swings

    Newt_on_Swings Member

    Messages:
    2,131
    Joined:
    Mar 30, 2011
    Location:
    NYC
    Shooter:
    Multi Format
    Glad everything worked out, next time work within a low edged plastic box, or lid with a lip, and line the bottom with a soft lint free cloth to prevent bounces.

    Soft clicks just means ninja mode activated haha. Also did you happen to get images of the filtermatic innards? Ive never had one but was always interested on how they positioned the filters/gels.
     
  5. EKDobbs

    EKDobbs Member

    Messages:
    124
    Joined:
    Jan 29, 2012
    Location:
    NC
    Shooter:
    Multi Format
    I would, but I didn't get that far into the lens.
     
  6. BrianShaw

    BrianShaw Member

    Messages:
    6,665
    Joined:
    Nov 30, 2005
    Location:
    Los Angeles,
    Shooter:
    Multi Format
    Thank you for your honesty.