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Thread: Where/how do you verify if a lens has deteriorated?

  1. #1
    Member
    Join Date
    Sep 2008
    Location
    Singapore, Boon Keng
    Posts
    12

    Default Where/how do you verify if a lens has deteriorated?

    Hi all,

    Some months ago, I accidentally dropped my Nikon 10.5mm full-frame fisheye lens. It still works OK, focuses, no scratch, etc. But I have this nagging feeling that images are slightly more blurred than they used to be.

    What is the best way to check if my lens is "faulty"? Would the Nikon service center have the equipment to test that it is still within acceptable quality range (or not)? If not, is there anywhere else I could go that could do that?

    Thanks in advance!
    Tim

  2. #2
    Senior Member
    Join Date
    Feb 2005
    Location
    sing
    Posts
    3,357

    Default Re: Where/how do you verify if a lens has deteriorated?

    Send to service centre. Maybe out of alignment. They should have equipment to test this. If not, better close shop.

  3. #3

    Default Re: Where/how do you verify if a lens has deteriorated?

    Depends on many factors, some questions.

    1) Drop from what height?
    2) On to what surface?
    3) Any focusing ring stiffness?
    4) When doing manual focusing, do you feel any resistance or grinding?
    5 Tested on tripod at safe shutter speed?
    WTB Manfrotto RC4 L Bracket

  4. #4

    Default Re: Where/how do you verify if a lens has deteriorated?

    Quote Originally Posted by timothee View Post
    Hi all,

    Some months ago, I accidentally dropped my Nikon 10.5mm full-frame fisheye lens. It still works OK, focuses, no scratch, etc. But I have this nagging feeling that images are slightly more blurred than they used to be.

    What is the best way to check if my lens is "faulty"? Would the Nikon service center have the equipment to test that it is still within acceptable quality range (or not)? If not, is there anywhere else I could go that could do that?

    Thanks in advance!
    Tim
    use the same settings and techniques of a previous photo and compare.

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