Thread: DIY Rear Projection SOLAR TELESCOPE
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  #10  
Old 10-01-2013, 12:08 PM
originaltrilogy (Petr)
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Join Date: Oct 2011
Location: Bathurst, NSW
Posts: 116
Does this mean blocking filter on its own can be used as Ha filter for DSO photo or is it too narrow?
Could Etalon be used for DSO?
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