Thread: Baader versus Astrodon Gen 11 filters
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Old 26-07-2010, 07:06 PM
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gregbradley
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Join Date: Feb 2006
Location: Sydney
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Hi Marco,

The mask is a black metal mask with a cutout the size of the sensor to prevent stry light reflecting off bright parts.

I believe they are standard on Prolines made after a certain date.

Greg.
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