Dusty lens

Discussion in 'Digital Photography' started by no--spam@pandora.be, Apr 25, 2005.

  1. Guest

    Just bought a "new" Canon zoom lens (28-135mm) for my EOS300D from
    www.digitalfirst.co.uk

    The lens was delivered and, on inspection, looked a little dusty. There
    was also a fingerprint on it, so someone had clearly handled the unit
    prior to shipping.

    I used a lens cloth to clean of the dust and fingerprint. On the
    internal face the front lens, however, there are still two small specks
    of dirt that I obviously can't get to with the cloth.

    Is it possible to disassemble the lens so that I can clean behind the
    lens?

    Would two or three small specks of dirt (less than 0.5mm across) behind
    the lens affect the camera performance anyway?
     
    , Apr 25, 2005
    #1
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  2. Roy Guest

    <> wrote in message
    news:...
    > Just bought a "new" Canon zoom lens (28-135mm) for my EOS300D from
    > www.digitalfirst.co.uk
    >
    > The lens was delivered and, on inspection, looked a little dusty. There
    > was also a fingerprint on it, so someone had clearly handled the unit
    > prior to shipping.
    >
    > I used a lens cloth to clean of the dust and fingerprint. On the
    > internal face the front lens, however, there are still two small specks
    > of dirt that I obviously can't get to with the cloth.
    >
    > Is it possible to disassemble the lens so that I can clean behind the
    > lens?
    >
    > Would two or three small specks of dirt (less than 0.5mm across) behind
    > the lens affect the camera performance anyway?


    Hi there.

    Yes it is entirely possible to disassemble the lens and clean the inner
    surface.

    The problem arises when re-building it. If any pieces of glass are not in
    exact positions relative to one another, or any of the mechanical parts have
    been moved, even slightly, then the lens will be rendered totally useless.

    Very specialist knowledge is required, Do not even think about attempting
    it.

    Almost every lens will have little specs of dust, or even marks within the
    glass, and they will have no effect on the photos. If the internal dirt gets
    so bad that it does have an effect, then the lens needs to go for
    professional cleaning.

    Roy G
     
    Roy, Apr 26, 2005
    #2
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  3. Shawn Hearn Guest

    In article <>,
    wrote:

    > Just bought a "new" Canon zoom lens (28-135mm) for my EOS300D from
    > www.digitalfirst.co.uk
    >
    > The lens was delivered and, on inspection, looked a little dusty. There
    > was also a fingerprint on it, so someone had clearly handled the unit
    > prior to shipping.
    >
    > I used a lens cloth to clean of the dust and fingerprint. On the
    > internal face the front lens, however, there are still two small specks
    > of dirt that I obviously can't get to with the cloth.
    >
    > Is it possible to disassemble the lens so that I can clean behind the
    > lens?


    Why bother? Unless you bought a grey market lens, it should have a
    warranty. Since the lens is new, return it or get it fixed under the
    warranty. Taking the lens apart will likely invalidate any warranty you
    have on it.
     
    Shawn Hearn, Apr 26, 2005
    #3
  4. wrote:
    > Just bought a "new" Canon zoom lens (28-135mm) for my EOS300D from
    > www.digitalfirst.co.uk
    >
    > The lens was delivered and, on inspection, looked a little dusty.
    > There was also a fingerprint on it, so someone had clearly handled
    > the unit prior to shipping.
    >
    > I used a lens cloth to clean of the dust and fingerprint. On the
    > internal face the front lens, however, there are still two small
    > specks of dirt that I obviously can't get to with the cloth.
    >
    > Is it possible to disassemble the lens so that I can clean behind the
    > lens?
    >
    > Would two or three small specks of dirt (less than 0.5mm across)
    > behind the lens affect the camera performance anyway?


    I agree 100% with Roy. It would appear what you have is just fine. It
    is not unusual at all.

    If you feel there is a problem, then I suggest you take it up with the
    seller as that is your right.

    --
    Joseph Meehan

    Dia duit
     
    Joseph Meehan, Apr 26, 2005
    #4
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