50mm f1.8 Series e + 200mm f4 AI

Discussion in 'Collector's Corner' started by monkeykoder, Nov 21, 2008.

  1. monkeykoder

    monkeykoder TPF Noob!

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    So some fungus on the 200mm f4 but looks like it will be easy to clean once I get my Ultra precision screwdrivers (tiny hole to get at screw through) (price was right at $25 (right for me at least). 50mm came free with the other lens focus ring is stuck and I can't seem to get the retainer ring to come off on the front of the lens any tips? I'm sure WD40 could do the trick but I'm pretty damned sure that would ruin a fine lens (not that I don't have an AF copy). I like the series e 50mm because it would go GREAT on my FM-10 it would be smaller and lighter than most rangefinders out there. Please tell me there is a way. (I was seriously considering a drill and a pin spanner...)
     
  2. Steph

    Steph No longer a newbie, moving up!

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    What did you try? Did you try to put a rubber band between the ring and your fingers and twist it that way?
     
  3. monkeykoder

    monkeykoder TPF Noob!

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    I tried using an idea I got from another website of taking the rear lenscap and some tape...
     
  4. Mitica100

    Mitica100 Moderator Staff Member Supporting Member

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    What's the diameter of the retaining ring? If it's small enough you can make some easy tools for removal. Usually a piece of PVC pipe (close to the diameter of the RR) and some rubber O ring glued to it, apply pressure downwards while unscrewing. Also, if memory serves me right, there are some RR which have a reversed thread, as in try unscrewing in CW direction.

    Best,
     
  5. monkeykoder

    monkeykoder TPF Noob!

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    I'm pretty sure the filter threading is 52mm so just inside of that. I tried using the rear lens cap like you're talking about with tape as grip and I'm getting nowhere. Since it was a freebie I want to tackle it before the 200mm which still takes pictures without much loss of quality.
     
  6. compur

    compur No longer a newbie, moving up!

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    If you mean the lens name ring, they are usually removed with a rubber tool.
    Find a rubber cork, table leg cap or something similar that fits and apply
    pressure as you turn.
     
  7. monkeykoder

    monkeykoder TPF Noob!

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    I finally got that ring out not too long ago it seems it was just a bit stuck using a jerking turning motion on the rubber tool I got it to come out without applying too much force. Now on to the more difficult parts.
     
  8. monkeykoder

    monkeykoder TPF Noob!

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    Well I screwed up... The aperture assembly fell out now I have to figure out how that works...
     
  9. monkeykoder

    monkeykoder TPF Noob!

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    Well if I wasn't a perfectionist I might rationalize that the job was a success... Any ideas on cleaning the 4 elements of the lens?
     
  10. Mitica100

    Mitica100 Moderator Staff Member Supporting Member

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    Do you have access to all sides of the elements?
     
  11. monkeykoder

    monkeykoder TPF Noob!

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    On the fungus infected one I don't have access to anything until I get a tiny screwdriver On the one I just fixed I can take that thing completely apart and put it back together with my eyes closed now. I just can't figure out how to get the fingerprints to come off.
     
  12. Mitica100

    Mitica100 Moderator Staff Member Supporting Member

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    The fingerprints can come off if you use 90% alcohol from any pharmacy. I like it better than the 70%. Also, you can do some other things to see if they work, such as using CLR on a piece of very soft fabric and gently trying to rub in spiral (from center to edge) after which, immediately use alcohol. Use only very soft materials so you don't scratch the glass. The CLR has worked wonders for me on some older lenses which I had abandoned hope for and I was pleasantly surprised to see the results. In any case, always finish with alcohol.
     

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