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Thread: How to use polariser?

  1. #1

    Default How to use polariser?

    Hi,

    Recently bought a 77mm B+W Circular Polariser. I'm not sure how to use it buy I know the theory behind the polarising light and the angle of polarisation.

    My question is, how does the polariser affects image quality? I heard it can give you warmer saturated colours but at which angle should it be?

    Also, is it advisable to use a polariser when it is cloudy or in indoors? It makes the image pretty dark...

    Thanks

  2. #2

    Default Re: How to use polariser?

    Quote Originally Posted by panzerpunk
    Hi,

    Recently bought a 77mm B+W Circular Polariser. I'm not sure how to use it buy I know the theory behind the polarising light and the angle of polarisation.

    My question is, how does the polariser affects image quality? I heard it can give you warmer saturated colours but at which angle should it be?

    Also, is it advisable to use a polariser when it is cloudy or in indoors? It makes the image pretty dark...

    Thanks
    polarises are normally used outdoors. use it to reduce reflection of water, and take the glare out of skies i.e. makes them a little bluer.

    best way to use one, is when you are outdoors, just turn the polariser until you aer happy with the effect that you get.

    one way that you can see how well it works, is go to a swimming pool where you ahve a lot of sunlight reflection. turn it slowly and you will see all the reflection dissapear.

  3. #3

    Default Re: How to use polariser?

    It brings minus about -2.5 stops.. if you learn how to calculate aperture....so if ur shooting at f4 the polariser will make it f5.2? something like that.

  4. #4
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    Default Re: How to use polariser?

    yup yup, turn the thing in front of the polarizer.

    the polarizer has 2 pieces of filter stacked together. i think it have a effect of 2/3 fstop down.

    i think it will make grass or trees greener also.
    D70s-er Since 2005

  5. #5
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    Default Re: How to use polariser?

    So do up + your exposure to compensate?

    Quote Originally Posted by zcwnfx
    yup yup, turn the thing in front of the polarizer.

    the polarizer has 2 pieces of filter stacked together. i think it have a effect of 2/3 fstop down.

    i think it will make grass or trees greener also.

  6. #6

    Default Re: How to use polariser?

    Quote Originally Posted by lastboltnut
    So do up + your exposure to compensate?
    plus ur exposure? Nope..just shoot as it is....just that ur shutter speed will suffer in that case. The polariser works as a ND filter too...

  7. #7
    Moderator catchlights's Avatar
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    Default Re: How to use polariser?

    Quote Originally Posted by renewification
    It brings minus about -2.5 stops.. if you learn how to calculate aperture....so if ur shooting at f4 the polariser will make it f5.2? something like that.
    What?
    2 stops down from f4 is between f8 and f11, so should be f9.5.
    Shoot to Live, Live to Shoot
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  8. #8
    Moderator catchlights's Avatar
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    Default Re: How to use polariser?

    Quote Originally Posted by zcwnfx
    yup yup, turn the thing in front of the polarizer.

    the polarizer has 2 pieces of filter stacked together. i think it have a effect of 2/3 fstop down.

    i think it will make grass or trees greener also.
    is just a pieces of polarizer glass having two ring, so it able to rotate.

    to maximize the effect, it will cut down 2~2 stops of light.
    Shoot to Live, Live to Shoot
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    Red face Re: How to use polariser?

    Differences? Take a look yourself.

    Without:


    With

    Andy Ang :lovegrin: - "A Photo speaks a thousand words. Have you spoken today?"
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  10. #10

    Default Re: How to use polariser?

    Nice sample pics to show the diff!

  11. #11
    Moderator catchlights's Avatar
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    Default Re: How to use polariser?

    Quote Originally Posted by lastboltnut
    So do up + your exposure to compensate?
    It depends,
    let say you are shooting with auto or programme mode, the camera will compensate automatically, if you use manual TTL metering, the TTL metering will factor the light loss.

    Unless you are shooting with manual mode and using hand held meter, need to open up the aperture or lower the shutter speed to compensate for the light loss.
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    Default Re: How to use polariser?

    Spot on!
    Andy Ang :lovegrin: - "A Photo speaks a thousand words. Have you spoken today?"
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  13. #13

    Default Re: How to use polariser?

    is it difficult to use cpl to make skies bluer?

    i read some articles like must have certain angle from the sun etc...like so cheam like that. any easier way?

  14. #14
    Moderator catchlights's Avatar
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    Default Re: How to use polariser?

    Shoot to Live, Live to Shoot
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    Default Re: How to use polariser?

    Thanks catchlights for your explanation!

    Quote Originally Posted by catchlights
    It depends,
    let say you are shooting with auto or programme mode, the camera will compensate automatically, if you use manual TTL metering, the TTL metering will factor the light loss.

    Unless you are shooting with manual mode and using hand held meter, need to open up the aperture or lower the shutter speed to compensate for the light loss.

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