Poloroids and Lenses
Name: Mark W.
Date: August 2003
I am interested in polarized lens as they apply to photography. I have been
told that if you use a polarized filter that you do not need a "hood" to protect from
"scatter" (reflections off other objects not perpendicular to the lens) light. I have
also been told that the polarizer does not stop scatter light. Which is correct?
A polarizing filter can be rotated to stop nearly all of the light polarized along any
one axis, and it will in any case stop roughly half of unpolarized light. Reflected
light is, in general, partially polarized -- the more grazing the reflection the greater
the degree of polarization. Scattered light usually is not polarized.
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Update: June 2012