When "not" to use a U/V filter?

Discussion in 'Digital SLR' started by Toomanyputters, Apr 24, 2005.

  1. I usually shoot in bright sunlight with a lens hood and a U/V filter. Is
    the U/V filter necessary with a lens hood? I don't see much danger in
    damaging the lens with a large hood.
     
    Toomanyputters, Apr 24, 2005
    #1
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  2. Does the UV filter pose a problem?

    Craig.
     
    Craig Marston, Apr 24, 2005
    #2
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  3. The real question is, "Is a UV filter necessary?" (HINT: The answer is
    no.)
     
    Randall Ainsworth, Apr 24, 2005
    #3
  4. Toomanyputters

    Alan Browne Guest

    Avoid using the filter if you can. If it is blowing dust, snow, mist,
    fog, etc. then it's a good idea to have it.

    The rubber lens hoods can collapse if you drop the lens face down. So
    some risk.

    On my 'fat' lenses I leave a UV filter in place and on site I decide
    whether or not to remove it (while always having the hood on. On my
    50mm and 100mm lenses I never have a UV filter on at all unless there is
    a lot of dust/fog/rain/mist...

    Cheers,
    Alan.

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    Alan Browne, Apr 24, 2005
    #4
  5. Toomanyputters

    Steve Guest

    Whether a UV filter is needed on a digital camera for the same reasons
    as a film camera is a very debated subject. The answer IMHO is it
    probably isn't. Having said that they serve to protect the lens if
    nothing else.

    If you use your hood virtually all the time i'd leave the filter off
    personally. I have a filter on to protect the lens, that's the only
    reason, and i'm too lazy to ever take it off.
     
    Steve, Apr 24, 2005
    #5
  6. Toomanyputters

    jfitz Guest

    Depends on what you are protecting the lens from. The hood will not offer
    protection from wind driven sand, dirt and water spray.
     
    jfitz, Apr 24, 2005
    #6
  7. Toomanyputters

    RichA Guest

    Don't use it when shooting pictures with the sun anywhere near or in
    the frame. Even with multicoatings, the filter introduces the
    possibility of flare. The fewer the elements in those situations,
    the better.
    -Rich
     
    RichA, Apr 25, 2005
    #7
  8. Toomanyputters

    Stacey Guest

    Ditto, the more glass you have the more likely you are to have flare/loss of
    contrast.
     
    Stacey, Apr 25, 2005
    #8
  9. Toomanyputters

    ol' coot Guest

    Direct sunlight can and does damage the sensor....
     
    ol' coot, Apr 27, 2005
    #9
  10. Toomanyputters

    Paul H. Guest

    It's not that a UV filter is necessary with a lens hood, it's more that the
    lens hood is needed more when you use a filter. Strong sidelighting can
    cause all sorts of funky problems other than simple lens flare and this is
    particularly true if you have a filter attached to the front of your camera.

    Also, don't forget that a filter has a finite coefficient of reflection, so
    light can pass through the filter, reflect from the diaphragm (or from other
    places), then be re-reflected from the filter's backside into the lens and
    then onto the sensor or film. In some cases, I've actually seen this
    produce a faint, hazy, slightly discolored circular blob extending from the
    center of the image outward. In some of the cases you catch yourself
    muttering "Now how did THAT happen?" when you look at an image, you'll often
    find that a filter has had something to do with the problem.

    Use filters for effect and protection and only when necessary: the fewer
    elements you have between image and object, the better the picture.
     
    Paul H., May 20, 2005
    #10
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