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Thread: Dust in my lens

  1. #1
    snegron's Avatar
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    Dust in my lens

    Any suggestions on how to remove dust from inside of my Nikon 105mm 2.5 AIS lens? I have no idea how dust got in there over time, but I would like to take the lens apart and clean it. Would this be a mistake? Any advice welcome.

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    Jim Jones's Avatar
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    Unless you are knowledgable in lens repair a good mechanic, and have the right tools it is probably a mistake. There are a few tricks to disassembly and reassembly that aren't apparent. The dust might not significantly affect lens performance.

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    Send it to Nikon for overhaul. Do not pass Go. Do not collect $200.

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    snegron's Avatar
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    Quote Originally Posted by Dan Fromm View Post
    Send it to Nikon for overhaul. Do not pass Go. Do not collect $200.

    Does Nikon still service old manual focus lenses? I heard that they have stopped servicing film cameras except for the F6 and FM10.

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    snegron's Avatar
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    Quote Originally Posted by Jim Jones View Post
    Unless you are knowledgable in lens repair a good mechanic, and have the right tools it is probably a mistake. There are a few tricks to disassembly and reassembly that aren't apparent. The dust might not significantly affect lens performance.

    I am not very mechanicaly inclined at all! All I see is that there are 3 screws on the lens mount...

    As for affecting picture quality, I'm really not sure. I just purchased another 105 today and plan to do a few test shots comparing it with my old lens. Since I have owned the old lens for about 23 years now I thought it was time replace it. Not only is there dust inside, there is also what appears to be a small spider web-like pattern on one of the inside elements. I checked with a couple of lens specialists that repair classic lenses and the price quoted was higher than buying a replacement lens. Only reason I'd like to clean or repair this old lens is because it has sentimental value for me.

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    Unless it is extremely dusty, I'd ignore it. Take it to a well known repair center to get an opinion and estimate of cost. Don't do it yourself.
    When I grow up, I want to be a photographer.

    http://www.walterpcalahan.com/Photography/index.html

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    Ignore the dust. Some time ago I checked all my Nikon lenses with a bright light shinning through the lens. All the lenses had dust, even relatively new lenses that I purchased new. But they all performed fine. If the dust is really bad and it bothers you, have it cleaned by Nikon. If you buy a replacement lens (used), it will probably have just as much dust, and maybe more.
    —Eric

  8. #8

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    Snegron
    It's usually easier to get the lens apart from the front if you don't need access to linkages.
    1)remove the decorator ring on the front. Tat's the one with the fl &sn info.
    Hie thee to the hardware store & pick up a rubber stopper with the largest diameter that will fit inside the filter threads. Using the edge of the stopper(hold it at an angle) apply pressure to the ring & turn it ccw. It should just unscrew.
    2) there should be three screws under the ring holding the filter threads on.
    remove them.
    3)At this point the front group itself should unscrew & give you access to the inner surfaces of the lens. The rear group will be behind the aperture blades so be careful back there.

    When you're done cleaning it, the lens reassembles by reversing the procedure above.
    Heavily sedated for your protection.

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    Quote Originally Posted by snegron View Post
    Does Nikon still service old manual focus lenses? I heard that they have stopped servicing film cameras except for the F6 and FM10.
    Nikon in Japan still does serve on their old cameras and lenses, just to let you know. They even take Nikon E series lenses if it's just a matter of cleaning and simple adjustment. They just don't have replacement parts any more for many of their older models.

    But I'm sure you can find a place near you for that.

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    snegron's Avatar
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    It would be nice if there were some diagram out there regarding this lens...

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