Thread: Whale Watching
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Old 10-11-2008, 08:09 PM
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sheeny (Al)
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Join Date: Jun 2005
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Nice work JJJ!

Was your polarising filter a circular polariser or a normal one? A lot of digital cameras need a circular polarising filter (it polarises with the magnetic and electrical field components of the light out of phase by 90°) to achieve focus.

Al.
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