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[OM] Re: Lighting question (Polarization)

Subject: [OM] Re: Lighting question (Polarization)
From: "Jay Drew" <dreaded@xxxxxxxxxxx>
Date: Thu, 8 Dec 2005 22:26:17 -0800
Right after posting my question about using linear vs circular polarizing
filters on light source vs lens,
I remembered a posting somewhere (perhaps even on this list) that gave a
quick and dirty method to determine
If a filter was linear or circular.  Viewing an LCD screen (linear light
source) through a linear filter,
Rotating the filter will produce a variable ND filter to a total blockage of
light.

The circular filter darkens lightly with what appears to me to be a slight
color shift.

That brings me sort of back to my original question.  Cirular on the lens -
linear on the source
Or 
Circular at both ends?

I believe Piers is correct that you get a variable ND filter with linear vs
linear.

Jay

Hand me my costume 
Please won't you pass me my mask
I have appointments I must keep with my past.
 
Bill Nelson - Beauty Secrets


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