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My friend, I'm yet to take a hydrogen alpha image myself.
Considering the Moon is out, and the forecast is supposedly clear for tonight, I might attempt Eta Carinae in hydrogen alpha on the STL/FSQ.
I've got a 7 nm filter, so, not sure how long my sub-exposures should be. My polar alignment is dead on. I'll try for ten minutes for starters and see how I go.
Cheers.
H
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