Thread: Alternative Narrow Band Filter Suppliers - H-Alpha
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Old 23-11-2015, 05:00 PM
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Merlin66 (Ken)
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Merlin66 is offline 		 
Join Date: Oct 2005
Location: Junortoun Vic
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John,
the link is for a 588nm filter not Ha.....
All the filters I've found so far are 25mm sometimes mounted in a 28mm threaded frame.
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