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Old 01-01-2019, 09:15 PM
raymo
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raymo is offline
 
Join Date: Sep 2011
Location: margaret river, western australia
Posts: 6,070
I have never seen the horizontal lines displayed by the Bahtinov with any
of the three Bahtinovs I have owned. Maybe it is to do with the scope being very fast[f/3.6], or maybe the Ha filter. I'm speculating that a positive Y
would be better; I imagine that you'd have to use a pretty bright star with the negative one.
raymo
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