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Hi Peter ,
Thanks for posting those 2 examples.
Your Starfire 152mm has a Dawes limit of 0.76 arc seconds.
Seeing would normally be only about 2 arc secs.
I think top seeing conditions would seldom be better than 1 arc sec.
I have noticed that seeing is much better at higher altitudes
compared with sea level.
It would be interesting if you re-did the pic again at high altitude.
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