Results 1 to 10 of 10

Thread: Usage of circular polarizer

  1. #1

    Default Usage of circular polarizer

    I intend to go to the zoo to take some shots but usually there are reflections on the glass separating the animals from us. Will a circular polarizer eliminate those reflections?

  2. #2
    Senior Member yyD70S's Avatar
    Join Date
    Dec 2005
    Location
    Singapore
    Posts
    2,454

    Default Re: Usage of circular polarizer

    Quote Originally Posted by net-g
    I intend to go to the zoo to take some shots but usually there are reflections on the glass separating the animals from us. Will a circular polarizer eliminate those reflections?
    Eliminate... maybe not completely; depends on the angle of polarised light.
    Reduce it... YES.

    Good thing is with an SLR, you can see the effect.

    Check this out:

    http://www.luminous-landscape.com/tu...larizers.shtml

    Regards
    Last edited by yyD70S; 5th February 2006 at 09:01 PM.

  3. #3
    Member
    Join Date
    Dec 2005
    Location
    East End
    Posts
    121

    Default Re: Usage of circular polarizer

    Quote Originally Posted by net-g
    I intend to go to the zoo to take some shots but usually there are reflections on the glass separating the animals from us. Will a circular polarizer eliminate those reflections?
    If used correctly a circular polariser can remove all glare. Just turn the thing until you are happy then shoot

  4. #4
    Member
    Join Date
    Oct 2005
    Location
    Bt. Timah
    Posts
    1,354

    Default Re: Usage of circular polarizer

    An alternative is to go close to the glass, with your lens almost flush.

    It's quite difficult to cut out reflections completely relying solely on a polariser... you'll need to do a lot of adjusting and sometimes it just isn't practical.

  5. #5
    Senior Member
    Join Date
    Jun 2005
    Location
    Melbourne, Australia
    Posts
    3,350

    Default Re: Usage of circular polarizer

    Do remember that the polarizer will prevent up to two stops of light from entering your lens. If you use this to remove the reflections from interior exhibits, I doubt if you'll be able to get a fast enough shutter speed to freeze action, let alone to handhold, unless you want to setup a tripod and don't mind shooting subjects which are less inclined to move eg. snakes, big insects.

    As Solarii mentioned, move your lens closer to the glass to cut off reflections, and adjust the angle of the lens to the glass as necessary to minimise the effect of reflections in your image. However you'll need a lens with quite a close focusing distance, otherwise you might be too close to the subject to get a focus.

  6. #6
    Senior Member scandisk's Avatar
    Join Date
    Feb 2005
    Location
    Tampines, Singapore
    Posts
    4,617

    Default Re: Usage of circular polarizer

    will need to shoot at a certain angle (approx 45 deg) to eliminate most of the reflection from the glass...

  7. #7

    Default Re: Usage of circular polarizer

    a CP filter can reduce but not totally eliminate reflections...

  8. #8

    Default Re: Usage of circular polarizer

    Actually, aren't the effects of a C-Polariser previewable in the view finder?

  9. #9
    Member
    Join Date
    Oct 2005
    Location
    Bt. Timah
    Posts
    1,354

    Default Re: Usage of circular polarizer

    Quote Originally Posted by topster
    Actually, aren't the effects of a C-Polariser previewable in the view finder?
    Yes they are. In fact you don't even need a viewfinder. Just hold it in front of you and turn it... you can see if it'll have any effect on the shot, esp in terms of cutting reflection.

  10. #10
    Senior Member sammy888's Avatar
    Join Date
    Sep 2004
    Location
    Singapore, Singapore, Singapor
    Posts
    1,568

    Default Re: Usage of circular polarizer

    Quote Originally Posted by topster
    Actually, aren't the effects of a C-Polariser previewable in the view finder?

    Yup...with all SLR and DSLR and all P&S that lets you compose your shot via the LCD monitor and the image is taken directly off the zoom lens and NOT the tiny auxillary viewfinder that you see in some P&S cameras at the top left corner.

    heheh I was also abit puzzle why he wrote that or maybe he knows this guy and his camera works in that manner.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •