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Re: polarizer?

Paul,

Normally, when one uses "filter factors" with more than one filter, the
factors are multiplied to reach a final "factor" value.

One uses the "addition" method when using the light absorbtion value as
"stops". I normally regard the polariser as having a "stop" value of 1 and
1/3 and the 25 red (when added to a polariser) as 2.

By "my way of working" this adds up to 3 and 1/3 stops which is much
different from your result of  5 "stops".

Ken




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