Well! Poop!

Discussion in 'Nikon Lenses' started by KmH, Apr 7, 2017.

  1. KmH

    KmH Helping photographers learn to fish Supporting Member

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    I shot some time lapse this morning and the entire 200 frame series came out seriously over exposed.

    It took me about 5 minutes to discover what the problem was.
    The aperture mechanism in my Nikon AF 24-85 mm f/2.8-4D is binding and can't reliably stop down from wide open (to AF) to the smaller than wide open aperture I wanted to use.

    For those that don't know:
    The lens aperture is moved by a motor in the camera body (all Nikon DSLR bodies).

    When a lens is not mounted on a Nikon DSLR the lens aperture is closed to as small as it can get by a spring.
    When the lens is mounted on the body, the in-the-camera to lens aperture linkage opens the aperture as wide as it can go. That's so what we see in the viewfinder through the lens is a bright as possible and so the AF system doesn't have to wait to do it's thing when the shutter is 1/2 pressed.

    I figure the repair will cost me about $250, which would be about $100 less than less than replacing the (bought it used) lens.


     
  2. astroNikon

    astroNikon 'ya all Bananas I tell 'ya Supporting Member

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    bummer

    didn't you send that in a while back to get it cleaned and focus sharper too ?
     
  3. KmH

    KmH Helping photographers learn to fish Supporting Member

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    Yep.
    I had it serviced (just clean, adjust, calibrate) by Nikon a while back.
    Like 2 years ago.
     
    Last edited: Apr 7, 2017
  4. KmH

    KmH Helping photographers learn to fish Supporting Member

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    I got around to scheduling a repair for the lens.
    Nikon's estimate, based on my checking Exposure Problem and description of the binding aperture, is $162 plus $16 to ship it back to me.
    I'll be shipping the lens UPS Friday morning, which is when I will next be going to the town where the closest UPS Store is.
    I'm west of the Mississippi, so it's going to Nikon Service on Wilshire Blvd in LA.
     
    Last edited: Aug 10, 2017
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  5. KmH

    KmH Helping photographers learn to fish Supporting Member

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    The lens is on the way back. It arrived at the Lenexa, KS UPS facility at 3 AM this morning.
    Per the estimate the cost - B2 service rank - was $161.70 and $15.50 for return shipping (UPS Ground).
     
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  6. KmH

    KmH Helping photographers learn to fish Supporting Member

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    UPS delivered the lens a few minutes ago.

    According to the Repair Invoice here is what they did:
    General check and clean.
    • Replaced the aperture lever.
    • Replaced the lens mount.
    • Replaced a retaining ring.
    Checked:
    Infinity Focus
    Aperture operation
    Exposure
    Communication
    Auto focus operation

    I figure the retaining ring failed letting whatever it was intended to retain get loose which damaged (bent?) the aperture lever and the lens mount.
    I suspect the lens mount damage was on the back side of the mount that can't be seen unless the lens mount is removed from the lens.
     
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  7. astroNikon

    astroNikon 'ya all Bananas I tell 'ya Supporting Member

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    how does it shoot though ?
     
  8. KmH

    KmH Helping photographers learn to fish Supporting Member

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    Like it did before it got fu'd.
     
  9. benhasajeep

    benhasajeep No longer a newbie, moving up!

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    Do they guarantee repairs? Maybe a call to NY will let you send it to the east coast for a look see (of course on their dime). Not betting on it. Would at least demand refund.
     

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