It's pretty difficult to beat a refractor image. I built the 10" to attempt besting it. As Siegfried mentioned, the 9" beat it, but only subtly. Not to mix topics, but I purchased a 4.5 mm Nagler to use with the 10" I don't really like it because it has too many internal reflections. I believe a simpler design would perform better than the Nagler for that high power. 4.5 mm yields 542 power on the 10". ________________________________ From: Kim <kimharch@cut.net> To: 'Utah Astronomy' <utah-astronomy@mailman.xmission.com> Sent: Friday, February 3, 2012 2:26 PM Subject: Re: [Utah-astronomy] Pick one and stick with it I've always been jealous of your refractor, Brent. I think it was in that scope that I first identified the Gallilean moons by their respective brightness/size and color - something I've only been able to do a handful of times since. Kim -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Brent Watson Sent: Friday, February 03, 2012 11:06 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] Pick one and stick with it I always have said that my 8" refractor would be the last to go. Having said that, I have already sold the 22" and given my 6" away, but still have my 12.5" f8 and my 10" f10. Perhaps the order would be: 1. 8" refractor 2. 12.5" f8 dob 3. 10" f10 planetary newt The secondary on the 10" is only 7/8" minor axis, and it has a BK7 window in front ground parallel and flat. No spider. It gives great images, almost as good as a refractor. I am glad I don't have to choose. But then, none of my scopes gets used much. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".