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> irradiation phenomenon

Alex

As I think about it, the perceived contrast ratio between the Sun/Sky and
sky/sea may well be affected by the choice of filters used.

A red or yellow filter will pass through more of the Sun's spectrum, while
blocking the blue of the sky.  A properly aligned polarizing filter,
especially against a northerly sky or other reflective object that passes
along reflected/aligned light waves will also increase the apparent contrast
between Sun and sky and/or block glare.

What this will do to perceived irradiation I do not know.  Perhaps another
list member has an informed opinion on this.

Bill

   

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