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 Astrophotography and Sketching >> Beginning Imaging Previous   Index   Next   Flat   yg1968 Carpal Tunnel Reged: 01/26/04 Posts: 1745 Re: M82       07/21/08 10:38 AM Edit   Reply   Quote   Quick Reply:   Thanks for the compliments and useful tips. I tried 3 minutes exposures but because of the full moon I decided to play it safe. I also used an IDAS LPS filter which probably helped. I can't push the stretching on this image as much as I would like because doughnuts start to appear. I know that I can do Flats to get rid of the doughnuts but I don't know how to do Flats. I need to find a good tutorial for doing Flats. Post Extras       Entire thread Subject Posted by Posted on M82 yg1968 07/20/08 05:43 PM Re: M82 stefsaber   07/20/08 10:06 PM Re: M82 s58y   07/21/08 09:14 AM Re: M82 yg1968   07/21/08 10:38 AM Re: M82 yg1968   07/26/08 10:04 AM Re: M82 DaemonGPF   07/20/08 09:55 PM Extra information 5 registered and 5 anonymous users are browsing this forum. Moderator:  Charlie Hein, knuklhdastnmr  Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Rating: Thread views: 253 Jump to *International Year of Astronomy 2009* -----   Global Coordination   Cornerstone Projects   Special Projects   Special Task Groups   Global Activities   National and Regional Activities   IYA 2009 in Africa   IYA 2009 in the USA*Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Beginners Forum   Celestial Events   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Celestron SkyScout and Meade mySky   Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   General Observing   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*Other* -----   Science of Astronomy & Space exploration   AstroWebsites   Space Rocks*Speciality Forums* -----   AstroArt   Astronomy Software & Computers   Stellar Media   Astro Outreach, Clubs and Star Parties*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements Home

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