Having recently purchased (yesterday) a 30mm GSO superview for use with my 12" dob, I was at first a little dissapointed.
Don't have much to compare it to. First view after having the scope set up for about an hour gave you those seagull effects that you read about around the outer image and nothing different to really write home about when comparing with a standard 26mm meade plossl (I actually preferred the meade), apart from a wider field of view.
However after leaving the scope for around another hour or so the views improved out of site, and that seagull effect dissapeared altogether.
Got up early this morning around 5.30 for a quick view of Jupiter after leaving the scope set up all night and the view was by far the best yet.
Definately much clearer images in fov once the scope or setup has cooled down.
KenM
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