Thread: Solar Filter Experiment
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Old 14-11-2020, 09:00 PM
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Max Vondel (Peter)
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Max Vondel is offline 		 
Join Date: Aug 2008
Location: Bairnsdale VIC
Posts: 437
Definite contrast increase with that blue/purple filter
Reminds me of the Coronado K telescope!
I wonder what ever happened to those?
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