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  1. #1

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    Oct 2012
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    Linear pola vs. Circular pola

    Hi all,

    What is the practical difference between a linear polarizer and a circular polarizer?

    Thanks.

    Joao

  2. #2
    chriscrawfordphoto's Avatar
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    Mar 2007
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    Some SLR cameras has semi-transparent mirrors to allow some light to pass through them to autofocus sensors or light metering cells under the mirror. If you have such a camera, you need a circular polarizer because a linear polarizer causes inaccurate meter readings and interferes with autofocus.

    All AF 35mm SLRs are like this. Several manual-focus cameras are too, like the Nikon F3, Olympus OM-4/4T, OM-3/3Ti, OM-PC, and OM-2sp
    Chris Crawford
    Fine Art Photography of Indiana and other places no one else photographs.

    http://www.chriscrawfordphoto.com

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    Fort Wayne, Indiana

  3. #3
    AgX
    AgX is offline

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    Three days ago this thread has been started on this issue:

    http://www.apug.org/forums/forum52/1...polarizer.html

  4. #4

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    The Nikon F-3 does not need circular polarizers as the camera has no semi-transparent mirror but many very very small slits in the center of the mirror.



 

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