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Thread: Fixing a Nikon 24-70mm F2.8 with AF problem

  1. #1
    Senior Member fatigue's Avatar
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    Default Fixing a Nikon 24-70mm F2.8 with AF problem



    For this lens, the problem root-cause is the loose felt cloth from the focusing ring



    Some felt cloth got entangled with the SWM mechanism


    If you noticed that the focusing ring suddenly became loose, it would be best to get your lens checked
    Last edited by fatigue; 26th December 2014 at 09:42 AM.
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    Senior Member Dfive's Avatar
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    Default Re: Fixing a Nikon 24-70mm F2.8 with AF problem

    So I presume they use the felt to Dampen the focus ring ?

    Shame its not like old school AI-S / or Zeiss ZF/ZF.2 lenses that rely on oils and precision metal alloy machining to offer the resistance I believe? ( can only dream... )
    See my WTS items.. :) Any sales is by meet up face to face, payment is cash only.

  3. #3

    Default Re: Fixing a Nikon 24-70mm F2.8 with AF problem

    Nothing last forever this days..

    Anyway, thks for sharing fatique!

  4. #4
    Senior Member fatigue's Avatar
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    Default Re: Fixing a Nikon 24-70mm F2.8 with AF problem

    Quote Originally Posted by Dfive View Post
    So I presume they use the felt to Dampen the focus ring ?

    Shame its not like old school AI-S / or Zeiss ZF/ZF.2 lenses that rely on oils and precision metal alloy machining to offer the resistance I believe? ( can only dream... )
    Just a trade off I guess. These modern lenses has to be light and fast. And with stiff competition, manufacturers have to save cost in parts.

    What's important is to know the symptoms of a loose felt from the focusing ring.
    Once the felt got stuck in the SWM mechanism, the circuitry that drives the motor could be fried if the owner still continue to use the lens
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