18mm 3.5 loose front element

Discussion in 'Olympus' started by guyvickers, Dec 9, 2003.

  1. Just purchased a very clean and fully functioning 18mm f3.5 As it
    had no 49-72mm front ring, I purchased a "General Brand" 49-72 ring.
    Upon screwing the General Brand into the front I rotated the front
    glass element. So continued to rotate the front element about 1.5
    turns until it became tight.

    Was this front element loose and I just fixed it? or have I just
    softened every picture? or is it just a MC protective element and it
    doesn't matter?

    Welcoming any feedback!
    Regards
    Guy
     
  2. My guess would be that it was loose; I don't think the design would allow you to misadjust it by overtightening the front retaining ring. Does it look okay in the finder? (I'd expect at least the focus to be off if it were out of place)

    :)=
     
  3. My Zuiko 18/3.5 don't feel loose and probably you just fixed it. I don't have the original Olympus filter and lens cover, So I put a 49-55 and 55-67 (or 55-72 if you want) step-up rings together and a metal 67mm lens cap permanently on the lens.
     
  4. Hi Richard

    Thanks for that, I checked and the image appears sharp, although at a guess not quite as sharp as a tele, but thats probably a focal length thing. As long as pics are sharp that are taken, which I'll test next.

    Regards
    Guy
     
  5. If all else fails check with John at Camtech, www.zuiko.com. His shop is near the Olympus warehouse in NY and he can fetch and correctly fit the necessary part for you.
     
  6. The 49-72 is an optional accessory for this lens, so isn't neccessarily supplied with the lens in the first place.

    This is certainly a high performance lens, so the result should be plenty sharp enough. You will see some darkening at the corners simply as a function of its incredibly wide angle of view, but this will improve as you stop down.
     
  7. It would be a loose element. Take no risks. Don't be cheap. Get it checked.

    I once spoke to an Olympus employee about the servicing of lenses because I was worried about repairers not returning lens elements to their correct placement in the light path - ie, not correctly aligned, thus causing a loss of image sharpness.

    He said this was rarely a problem because "the elements just drop back into where they're supposed to be".

    I used to own the Tokina 17mm f/3.5 lens, but I traded up to the Olympus 18mm f/3.5. The Tokina was a better lens, IMHO.

    So I swapped the Olympus 18mm f/3.5 for the 21mm f/2 lens. And then I bought another Tokina 17mm f/3.5 off eBay. Good luck!
     

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