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Thread: polarisers

  1. #1

    Default polarisers

    how do you use a polariser?screw on and fire away?

    can photoshop CS2 replicate the end result of using a polar?

  2. #2

    Default Re: polarisers

    I don't think cs2 can replicate the same thing. If I am not wrong, you are supposed to screw on the polariser and shoot.

  3. #3
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    Default Re: polarisers

    screw on the polarizer and turn the front panel. It gives a 'more blue sky'. Not only that, you can shoot through glass, water and flat area without much reflection.

  4. #4

    Default Re: polarisers

    Quote Originally Posted by jeanie View Post
    how do you use a polariser?screw on and fire away?

    can photoshop CS2 replicate the end result of using a polar?
    Photoshop will not be able to recreate teh effects of a polarizer.

    Here is a good link to a very comprehensive yet simple explanation.

    http://www.cs.mtu.edu/~shene/DigiCam...polarizer.html
    deadpoet
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  5. #5
    Moderator ortega's Avatar
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    Default Re: polarisers

    a pola's main purpose is to cut polarised light

    after putting it in front of your lens, you still need to fiddle around with it for maximum effect

  6. #6
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    Default Re: polarisers

    FYI the BW cir polarizers 77mm at CP are sold out

    No choice I had to get the Hoya.

    Cir polarizers are good for outdoor shoot and have to use your fingers to rotate till u get the effect u want.

  7. #7

    Default Re: polarisers

    Quote Originally Posted by jeanie View Post
    how do you use a polariser?screw on and fire away?

    can photoshop CS2 replicate the end result of using a polar?
    hav commercial plugin 4 that.

  8. #8
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    Default Re: polarisers

    most of the time the lens hood gets in the way, esp during rotating the filter...

    mayb thats me

  9. #9
    Senior Member zac08's Avatar
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    Default Re: polarisers

    Quote Originally Posted by glensky View Post
    hav commercial plugin 4 that.
    Well, then.... pray tell... how do you replicate the effects of a CP-L when you're shooting at surfaces of water and trying to capture the fishes just under the surface without the CP-L and using CS...
    Michael Lim
    My Flickr Site

  10. #10
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    Default Re: polarisers

    Quote Originally Posted by ernest_ted View Post
    most of the time the lens hood gets in the way, esp during rotating the filter...

    mayb thats me
    Well, don't use lens hood. Use your hands if neccessary to shield the sunrays.
    "Photography is an austere and blazing poetry of the real" -Ansel Adams

  11. #11
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    Default Re: polarisers

    Quote Originally Posted by blive View Post
    Well, don't use lens hood. Use your hands if neccessary to shield the sunrays.
    for my case sometimes not easy nor possible..
    if u r using 17-35mm or 28-70mm fairly easy and still possible
    if u r using 70-200mm cannot lah too heavy
    Last edited by ernest_ted; 13th December 2006 at 11:54 AM.

  12. #12

    Default Re: polarisers

    but people told me polarisers must shoot what 90 degrees to the sunlight or whatsoever.can someone explain in detail?

  13. #13
    Moderator ortega's Avatar
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    Default Re: polarisers

    Quote Originally Posted by ernest_ted View Post
    for my case sometimes not easy nor possible..
    if u r using 17-35mm or 28-70mm fairly easy and still possible
    if u r using 70-200mm cannot lah too heavy
    use a tripod?

  14. #14
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    Default Re: polarisers

    Quote Originally Posted by jeanie View Post
    but people told me polarisers must shoot what 90 degrees to the sunlight or whatsoever.can someone explain in detail?
    something like that, but best is to use your eyes and judge as you turn the pola
    once you see what works best, just go for it

  15. #15

    Default Re: polarisers

    Quote Originally Posted by ortega View Post
    something like that, but best is to use your eyes and judge as you turn the pola
    once you see what works best, just go for it
    so i meter with the polar on?
    or meter first then polar on?

  16. #16
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    Default Re: polarisers

    Quote Originally Posted by jeanie View Post
    so i meter with the polar on?
    or meter first then polar on?
    you have ttl metering so meter with pola on

  17. #17

    Default Re: polarisers

    Quote Originally Posted by jeanie View Post
    but people told me polarisers must shoot what 90 degrees to the sunlight or whatsoever.can someone explain in detail?
    This time for the public, but only the short version

    light is a funny thing, it acts sometimes like a particle and sometimes like a wave. With a polariser we are using its wave properties. As the sun light travels through the atmospere it is scattered or spread causing the blue sky during the day and reddish skies at dawn or dusk. Scatter light is polarized and it is strongly polarized perpediculare to the direction of primary source (the sun). Hence, polarizing effects are strongest 90deg to the sun.

    let me know if you want the long version as well...
    Never forget rule 5
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  18. #18

    Default Re: polarisers

    Quote Originally Posted by jeanie View Post
    so i meter with the polar on?
    or meter first then polar on?
    What I do is to compose first, then turn the polariser until i get the effect i want, meter then shoot.

  19. #19

    Default Re: polarisers

    Quote Originally Posted by jeanie View Post
    so i meter with the polar on?
    or meter first then polar on?
    with pola on, cause in any case you loose about 2 exposure steps...
    Never forget rule 5
    My Flickr

  20. #20

    Default Re: polarisers

    Quote Originally Posted by Michael View Post
    This time for the public, but only the short version

    light is a funny thing, it acts sometimes like a particle and sometimes like a wave. With a polariser we are using its wave properties. As the sun light travels through the atmospere it is scattered or spread causing the blue sky during the day and reddish skies at dawn or dusk. Scatter light is polarized and it is strongly polarized perpediculare to the direction of primary source (the sun). Hence, polarizing effects are strongest 90deg to the sun.

    let me know if you want the long version as well...
    you know me.i want the full details.i dun wan to learn 1/2 1/2 bucket of water.

    so HOW do i measure 90degrees?

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