Thread: Solar viewing ? filters
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  #9  
Old 20-08-2008, 05:00 PM
caleb
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caleb is offline 		 
Join Date: Dec 2007
Location: gosford, australia
Posts: 206
H-Alfah filter? is this nesesary to view solar flares.
is it some complex electronic thing or is it just a type of filter i can afford...
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