Thread: Field flatener & H-Alpha filter question
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Old 19-02-2013, 08:25 PM
axle01 (Alan)
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Field flatener & H-Alpha filter question
Looking to get a good quality field flattener and a H-Alpha filter for a ULT United Optics APO 132 triplet http://www.astronomyalive.com.au/astrophotography/astrophotographic-telescope...
Any advise would be appreciated.

Alan
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