Why circular polarizers?

Started May 11, 2014 | Questions thread
Wheatfield7 Senior Member • Posts: 5,445
Re: Why circular polarizers?

bosjohn21 wrote:

this is a quote from the Luminous Landscape in answer to the question why a circular Polarizer is necessary for almost all slr and dslr cameras.

"The reason for this is that both of these systems use semi-silvered mirrors to siphon off some of the light coming though the lens. If that light is linearly polarized it renders either the metering or the autofocus ineffective. This means that you're going to have to buy circular polarizers unless you're shooting with a pre-1970's camera, or a view camera."

Amazing how they package partial misinformation disguised as actual information.

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