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  1. #11

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    Mar 2012
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    Quote Originally Posted by Kirks518 View Post
    I guess I'm confused.

    a) Will the lens focus to infinity, ie, you can take a picture of something at infinity, and it will be in focus, but the barrel markings show it to not be at infinity?

    Or

    b) When you turn the focus ring to the infinity mark, the actual point of focus is about 10 meters away?

    When I responded, I read the issue as b.

    Also, i found a great 'tool' for removing the beauty ring, and other similarly secured parts on lenses - http://www.homedepot.com/p/Oatey-3-i...3402/100168770
    It has a nice big hole in the middle that's tapered, so nothing touches the actual glass, and it's cheap. It comes in a couple of sizes, can't remember which size I have (2-1/2"?).

    It is b) case.

  2. #12

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    Oct 2013
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    Then I stand by my original guesses - either the helicoid (?) was put back on wrong after a disassembly, or there is something out of whack.

  3. #13
    David Lyga's Avatar
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    Nov 2007
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    VERY easy solution here: First, modify your 'alter ego' and get a set of miniature screwdrivers. Now, listen:

    First, you need to unscrew the logo ring on the front of the lens. I usually pad each 180 degree side with several small layers of duct tape, then gently hold each arm of a scissors on each side and turn the scissors (counter clockwise). That usually starts the logo ring turning. When loose, you might even be able to unscrew it completely with your fingers. Of course, what I said assumed that the filter ring is not bent (Ouch! That would involve using pliers to straighten that filter ring and that is not too pleasant to do it correctly.) Also, make certain that the threads are CLEAN first, or you will be grinding dirt and causing much friction. I assume that that logo ring is now off the lens.

    Then, unscrew the three screws holding that filter ring. Be careful not to lose anything in your exitement, alter-ego, or you will have to change your ego to one of angst.

    Now, the fun part: you have three MORE screws to loosen: those holding the helical to the focusing ring. Simply LOOSEN (not remove) them and you can adjust infinity focus easily. Be at a convenient 'infinity' venue where you can check this out (i use my window which faces skyscrapers about 1/4 mile away), and when you are convinced that you are at (or, better, very slighly BEYOND, infinity), lock those three helical screws again and put back the filter ring and logo ring. And then you are done with the fun.

    If you were in Philadelphia I would do this in five minutes for you. If you cannot follow this call me at 215.569.4949. - David Lyga
    Last edited by David Lyga; 07-16-2014 at 03:28 PM. Click to view previous post history.

  4. #14

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    Mar 2012
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    Quote Originally Posted by David Lyga View Post
    VERY easy solution here: First, modify your 'alter ego' and get a set of miniature screwdrivers. Now, listen:

    First, you need to unscrew the logo ring on the front of the lens. I usually pad each 180 degree side with several small layers of duct tape, then gently hold each arm of a scissors on each side and turn the scissors (counter clockwise). That usually starts the logo ring turning. When loose, you might even be able to unscrew it completely with your fingers. Of course, what I said assumed that the filter ring is not bent (Ouch! That would involve using pliers to straighten that filter ring and that is not too pleasant to do it correctly.) Also, make certain that the threads are CLEAN first, or you will be grinding dirt and causing much friction. I assume that that logo ring is now off the lens.

    Then, unscrew the three screws holding that filter ring. Be careful not to lose anything in your exitement, alter-ego, or you will have to change your ego to one of angst.

    Now, the fun part: you have three MORE screws to loosen: those holding the helical to the focusing ring. Simply LOOSEN (not remove) them and you can adjust infinity focus easily. Be at a convenient 'infinity' venue where you can check this out (i use my window which faces skyscrapers about 1/4 mile away), and when you are convinced that you are at (or, better, very slighly BEYOND, infinity), lock those three helical screws again and put back the filter ring and logo ring. And then you are done with the fun.

    If you were in Philadelphia I would do this in five minutes for you. If you cannot follow this call me at 215.569.4949. - David Lyga
    thanks David, that is quite clear... And Europe is far away from Philadelphia

  5. #15
    David Lyga's Avatar
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    When you have loosened the three screws that hold the helicoid, that helicoid will be able to turn INDEPENDENTLY of the focus ring. It is at that time that you can focus properly (via helicoid, not via focus ring) and when you are satisfied with the focus, turn the now loose focus ring to infinity and tighten those three screws again. - David Lyga

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