· Get a Cloudy Nights T-Shirt · Submit a Review / Article Click here if you are having trouble logging into the forums 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 Astrophotography and Sketching >> Beginning and Intermediate Imaging Previous   Index   Next   Threaded   Pages: 1 hungerford super member Reged: 08/23/08 Imaging Issue       #5592779 - 12/28/12 02:25 PM Edit   Reply   Quote Quick Reply   Hi, I am trying to image with a GSO 10" newtonian f4 but the stars are not round and the is shadow on the botton left hand of the stars. When I image a bright star I get the normal reflection cross plus some flaring a 11 and 5 0'clock. The camera is use is a QHY9c fitted with a Baader MPCC corrector placed at 55mm from the chip. The scope was collimated with a cheshire eyepiece and finished with a laser. The laser has been correctly collimated. I do not know what is creating this extra spike and I do not know what to look for. Any help with this would be really appreciated. Here is a single frame of 5 minutes exposure. http://www.flickr.com/photos/61128796@N08/8319345100/in/photostream Many thanks for your help. Vince Post Extras:       JoseBorrero Carpal Tunnel Reged: 09/04/09 Loc: MI Re: Imaging Issue [Re: hungerford]       #5593162 - 12/28/12 07:09 PM Edit   Reply   Quote Quick Reply   can't tell about the comma, usually the MPCC do an excellent job, but you should collimate with camera installed as flexure can take part when installing the camera and can explain the extra spike. Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 10 registered and 12 anonymous users are browsing this forum. Moderator:  Undermidnight, fishonkevin  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 250 Jump to *Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Celestial Events*General Astronomy* -----   Beginners Forum   General Observing and Astronomy   Outreach   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning and Intermediate Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   NEO   Planetary and Solar System Observing   Lunar Observing   Deep Sky Observing   Double Star Observing   Solar   Variable Star Observing and Radio Astronomy*Telescope Specific Forums* -----   Celestron NexStar    NexStar GPS / CPC Telescopes   Questar Forum   Meade ACF/RCX / LX / GPS    Meade ETX*Speciality Forums* -----   Arizona Science and Astronomy Expo   NEAF (Northeast Astronomy Forum) and NEAIC (Northeast Astro Imaging Conference)   AstroArt   Astronomy Clubs and Star Parties   Astronomy Software & Computers   AstroWebsites   Science! Astronomy & Space Exploration, and Others   Space Rocks   Stellar Media*Swap and Shop* -----   Shop and Swap Audio Components*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements*International Year of Astronomy 2009 - Forums are now closed.* -----   IYA Archive Info CN Forums Home

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