Circular Polariser

dandantheadminman · Posted: Tue Aug 22, 2006 8:30 pm Post subject: Circular Polariser

Does anyone know is using a circular polarisng filter effect the shutter speed or aperature? I mean, like does using a circ, polarising filter mean you have to use longer shutter speed for example?

hope you can help

JMK33 · Posted: Tue Aug 22, 2006 10:11 pm Post subject:

dandantheadminman · Posted: Tue Aug 22, 2006 10:36 pm Post subject:

it'll be a screwon in front of the lens
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bluebomberx · Quite High User Joined: 01 Oct 2006 Posts: 134

It does not stay the same. Depending on what brand of polarizer you are using, it will cut 1-1/2 to 2-1/2 stops of light from the exposure (the package should tell you). If you are using an auto exposure mode in your camera, it will compensate for you. If you are using a camera with an external light meter, you will have to manually adjust the exposure. If you are looking into buying a polarizer for your auto focus camera, make sure it is a circular polarizer. If you accidentally or intentionally buy a linear polarizer, it will impair the auto focus and metering of your camera.

dandantheadminman · Posted: Sun Oct 01, 2006 8:12 pm Post subject:

yeh itll be autofocus so i should be fine

thnx

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