using a red and circular polarizer together

Discussion in 'Beyond the Basics' started by meesh, Mar 11, 2007.

  1. meesh

    meesh TPF Noob!

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    Hi! Just curious...what kind of effect would you get using a red and circular polarizer filter together for B&W film photography? Would you ever recommend it? Any samples?
     
  2. Garbz

    Garbz No longer a newbie, moving up!

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    You can try it quite easily. Put a polariser on your lens and take a picture. Then in photoshop or another image editing program look at the red channel in greyscale only and you will see exactly how it will turn out.

    Watchout when stacking filters as it will often cause vignetting at the extreme wide angle of the lens.
     
  3. Sw1tchFX

    Sw1tchFX TPF Noob!

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    Nah, don't do it that way.

    Your sky will most likely turn pitch black and anything red would become white. the polarizer would cut down on reflections. You're going to want to have your red filter on and the poarizer on top of that so you can still rotate it.
     
  4. fightheheathens

    fightheheathens TPF Noob!

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    red filters block blue light and let in red light. so you get the dark skys with white clouds effect. A polarizer further enhances this effect.

    all of my B&W outside pics are shot with a polarizer and a red filter.
    if you use digital, it doesnt make sence to use a red filter because you can add it later in photo shop, but with film, no such luck

    here is an example
    http://img.photobucket.com/albums/v47/wewillfighttheheathens/goldengate2.jpg
     
  5. Torus34

    Torus34 No longer a newbie, moving up!

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    When using two filters, remember that the filter factors should be multiplied [not added] before determining the f-stop correction.
     
  6. fightheheathens

    fightheheathens TPF Noob!

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    so if my red filter with a 2 stop reduction and my polarizer with a 1 stop reduction get multiplied i get a total of 2 stops reduction....that doesnt make sence....
    unless you do it where the red filter is 4 and the polarizer is 2 which gives you a 4 stop reduction...but im pretty sure that i only see a three stop reduction when using that combo....
     
  7. meesh

    meesh TPF Noob!

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    awesome photo fight... ok so another question- if im using my in camera meter, doesnt it do the metering according to the filters? i wouldnt have to bracket would i? hey fight did you have the red filter on the lens first and then add the polarizer?
     
  8. fightheheathens

    fightheheathens TPF Noob!

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    crap....lost a whole post....

    anyway, if you have TTL metering, (through the lens) your camera will compensate for the filters.
    I have a Cokin system so i have to put the polarizer first, then the red filter.
    I focus, and meter and compose with the red and polarizer on. The red lets me see in black and white.
     
  9. Torus34

    Torus34 No longer a newbie, moving up!

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