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Usefulness of H-alpha filters?

Started by [email protected], 12/15/2002 01:36PM
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Posted 12/15/2002 01:36PM Opening Post
Bob Polcyn
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Join Date: Dec 2001

Location: Hot Springs SD, US

Posts: 174

Hi all --

Right now there are two 'H-alpha' filters for sale on Astromart which appear to be deep red but otherwise clear glass. Are these for use as pre filters or are they useful for viewing/imaging in their own right?
Thanks for any info.

Bob Polcyn
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