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  1. #1
    David Brown's Avatar
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    Can filter threads be straightened?

    Opps. Dropped a lens.

    It seems fine as to focus, aperture amd glass; but, of course, the filter threads took the worst of it. I could live without a filter, but a screw-on lens hood would be nice. (So would a filter, actually ...)

    Can this be done successfully? Any recommendations for a tech?

    Thanks!

    David

  2. #2

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    Try this link for a few different tools to take the dent out of lens filter rims.
    http://www.micro-tools.com/Merchant2/lens.htm

    The better of the bunch is:

    http://www.micro-tools.com/Merchant2...oduct_Code=LV1

  3. #3
    David A. Goldfarb's Avatar
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    It's worth a try, but an iffy proposition. They often just don't work well after being straightened.
    flickr--http://www.flickr.com/photos/davidagoldfarb/
    Photography (not as up to date as the flickr site)--http://www.davidagoldfarb.com/photo
    Academic (Slavic and Comparative Literature)--http://www.davidagoldfarb.com

  4. #4
    bobfowler's Avatar
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    Quote Originally Posted by David A. Goldfarb
    It's worth a try, but an iffy proposition. They often just don't work well after being straightened.
    And sometime - even if you use the correct tools - the threads will just break off when you try to straighten them. That is especially true with older aluminum lens barrels.
    Bob Fowler
    fowler@verizon.net
    Some people are like Slinkies. They're really good for nothing, but they still bring a smile to your face when you push them down a flight of stairs.

  5. #5

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    It's a crap shoot.

    The only way to know if it can be done is to do it. First you have to get the lens round again. That is where the tool comes in handy although I like the wood plug and tap it gently with a leather hammer to get the shape back.

    Once that is done, you have to chase the threads out. Either you use a thread tap made for the size or an old filter ring with grooves cut in it to let out the scrap metal shavings as it goes around. A small amt of tapping fluid is used and cutting has to be done very slowly backing the tap out for every 1/8th turn you make or you'll clog the cutter. Sometimes the thread tear out if the aluminum is old and brittle but then again if the damage wasn't too bad it works like a charm.

    If it doesn't work, Corkin filters are your best friend.
    Anyone can make a Digital print, but only a photographer can make a photograph.

  6. #6
    David A. Goldfarb's Avatar
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    If it kind of works but not well, and it's not a wide lens where vignetting would be a problem, one option is to put an empty filter ring on the lens, and then put any additional filters on the empty ring.
    flickr--http://www.flickr.com/photos/davidagoldfarb/
    Photography (not as up to date as the flickr site)--http://www.davidagoldfarb.com/photo
    Academic (Slavic and Comparative Literature)--http://www.davidagoldfarb.com

  7. #7

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    How about using a step up ring to avoid these problems? You'll just have to buy a new set of filters in your new size.
    Anyone can make a Digital print, but only a photographer can make a photograph.

  8. #8
    colrehogan's Avatar
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    How bad is the dent?
    Diane

    Halak 41

  9. #9

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    My concern would be whether any of the internals of the lens were thrown out of alignment, or other invisible damage. That said, I have an Oly 35RC with dinged threads, and the lens seems super sharp. Same with a 100mm lens for OM, though I haven't critically evaluated that one.

    Earl
    Honey, I promise no more searching eBay for cameras.

  10. #10
    jimgalli's Avatar
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    Quote Originally Posted by paul ron
    How about using a step up ring to avoid these problems? You'll just have to buy a new set of filters in your new size.
    Stepping ring is the ticket. I usually get a smaller ring that will fit loosely in the threads where the ding is then carefully apply outward pressure on the smaller ring which is protecting the important threads with a pliers. It'll never be perfect again but if it's good enough to force a stepping ring on, you're back in business.
    He is no fool who gives what he cannot keep..to gain that which he cannot lose. Jim Elliot, 1949

    http://tonopahpictures.0catch.com

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