Checking of dropped lens

Discussion in '35mm Cameras' started by Londoner, Nov 15, 2004.

  1. Londoner

    Londoner Guest

    I dropped my fixfocal Nikkor lens on concrete, hight was ~ 1 meter.
    The shock was partially absorbed by filter (filter frame has been
    distorted). The barrel itself looks OK as well as glass (nothing has
    been broken virtually). AF works as bebore asaperture ring does. So,
    what coud happen with it and how can I test consequences of the drop?
    Londoner, Nov 15, 2004
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  2. Londoner

    Alan Browne Guest

    I assume it wasn't attached to a camera?

    Checklist (despite what you say above).

    --examine the filter for extreme damage near where it joins the lens.

    If it looks really bad, take it to a photo shop for their advice.

    If it looks good, then:

    --(attempt to) remove the filter. If stuck, put a wide rubber band around it to
    improve your grip... don't force it too hard if it resists. If it is really
    tough, ...go to the photo shop...

    --verify that it focuses freely without resistance ... that it feels pretty much
    as it felt before.

    --verify that the aperture ring can be freely moved and that aperture readings
    on the body (if applicable) are correct.

    If all that goes well, and otherwise it looks undamaged, you're probably out of
    the woods.

    Then of course shoot a few frames to be sure at close, distant and mid focuses
    and at various apertures at those distances. (Shoot these tests for the current
    SI would be a good idea).


    -- r.p.e.35mm user resource:
    -- r.p.d.slr-systems:
    -- [SI gallery]:
    -- [SI rulz]:
    -- e-meil: there's no such thing as a FreeLunch.
    Alan Browne, Nov 15, 2004
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  3. What a pity.

    Next time, do the job right!

    I suggest at least a three-storey drop next time.

    You can never be too careless!
    Uranium Committee, Nov 16, 2004
  4. The only non-visible damage (i.e. a cracked lens element would be
    visible) is that one or more elements can get decentered.

    A repairman using a collimator can check that in seconds, but the price
    may not be proportional to the time... : (

    If you are familiar with the lens, shoot it at full aperture and check
    that the results in all corners are as sharp as before.

    FYI I once dropped a Nikkor from about the same height & with the same
    damage (the filter sacrificed itself): I did have the centering checked
    and it was o.k.
    Chris Loffredo, Nov 16, 2004
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