Click here if you are having trouble logging into the forums Cloudy Nights - Official Forums of the 2009 International Year of Astronomy Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User   You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Equipment Discussions >> Cats & Casses Previous   Index   Next   Flat   Dennis Sakva Pooh-Bah Reged: 10/19/04 Posts: 1099 Loc: Kiev, Ukraine Re: Story about SN, Roddier and relative orientati       07/02/08 04:27 AM Edit   Reply   Quote   Quick Reply:   Thanks dvb, I belive that large portion of astigmatism is due to glued mirror and telescope pointing at horison (it reduces further when telescope is pointed up). Coma is due to miscollimation and somewhat off-axis star. Even though the improvment was easily visible through the eyepiece I think that Roddier test is extremely useful tool to numerically evaluate scope performance. I wouldn't use absolute numbers from this test but on relative basis it should work. Post Extras       Entire thread Subject Posted by Posted on Story about SN, Roddier and relative orientation! Dennis Sakva 07/01/08 11:32 AM Re: Story about SN, Roddier and relative orientati photonovore   07/01/08 12:10 PM Re: Story about SN, Roddier and relative orientati dvb   07/01/08 12:31 PM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/02/08 02:43 AM Re: Story about SN, Roddier and relative orientati dvb   07/02/08 03:49 AM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/02/08 04:27 AM Re: Story about SN, Roddier and relative orientati Cyclop_si   07/02/08 06:22 AM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/02/08 07:25 AM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/06/08 09:00 AM Re: Story about SN, Roddier and relative orientati Mert   07/09/08 01:35 PM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/10/08 02:15 AM Re: Story about SN, Roddier and relative orientati MtnGoat   07/10/08 02:56 PM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/11/08 02:09 AM Re: Story about SN, Roddier and relative orientati snufus   07/12/08 05:06 AM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/14/08 05:54 AM Re: Story about SN, Roddier and relative orientati ClownFish   07/14/08 07:04 AM Re: Story about SN, Roddier and relative orientati Mert   07/15/08 01:18 PM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/16/08 02:01 AM Re: Story about SN, Roddier and relative orientati blackhaz   07/16/08 04:50 AM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/16/08 08:38 AM Re: Story about SN, Roddier and relative orientati Mert   07/16/08 11:33 AM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/16/08 12:21 PM Re: Story about SN, Roddier and relative orientati Mert   07/16/08 02:13 PM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/17/08 09:19 AM Re: Story about SN, Roddier and relative orientati Mert   07/17/08 05:15 PM Re: Story about SN, Roddier and relative orientati Dennis Sakva   07/21/08 04:59 AM Re: Story about SN, Roddier and relative orientati Mert   07/22/08 10:46 AM Re: Story about SN, Roddier and relative orientati mxb   08/24/08 08:53 PM Extra information 3 registered and 13 anonymous users are browsing this forum. 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