· Get a Cloudy Nights T-Shirt · Submit a Review / Article    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] Forum Archives · Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Astrophotography and Sketching >> DSLR & Digital Camera Astro Imaging & Processing Previous   Index   Next   Threaded   Pages: 1 Mike C sage Reged: 03/05/08 Posts: 362 Loc: Cornwall, UK Another M31 !       #3396067 - 10/18/09 11:53 AM Attachment (17 downloads) Edit   Reply   Quote Quick Reply   This is the result of 15 x 2-min, 5 x 4-min and 2 x 5-min exposures at ISO 1000, over 2 nights, with an unmodded EOS 40D and Pentacon 300mm lens at f4, piggybacked for manual guiding on a C8 and Super Polaris mount. DeepSkyStacker was used to register and stack the subs, darks and flats and Canon Photo Professional to adjust Curves. Thanks for looking. Clear skies! -------------------- Mike Crowle http://www.pbase.com/mcrowle/astrophotography Meade Series 5000 ED Apo 127mm Celestron C8 SCT (1991 model) Losmandy G-11; Vixen Super Polaris Canon EOS 40D (unmodded); Philips SPC-900NC Webcam Post Extras:       cdndob professor emeritus Reged: 07/28/06 Posts: 657 Loc: The Great White North Re: Another M31 ! [Re: Mike C]       #3396122 - 10/18/09 12:24 PM Edit   Reply   Quote Quick Reply   Nice shot using a 300mm lens and manual guiding! I think a few more 4-5min subs @ ISO1600 would help bring out the outer area details. Steve -------------------- Post Extras:       Mike C sage Reged: 03/05/08 Posts: 362 Loc: Cornwall, UK Re: Another M31 ! [Re: cdndob]       #3397992 - 10/19/09 12:58 PM Edit   Reply   Quote Quick Reply   Thanks for the comment, Steve. I will follow your suggestion and get some more subs for the fainter stuff. Regards. -------------------- Mike Crowle http://www.pbase.com/mcrowle/astrophotography Meade Series 5000 ED Apo 127mm Celestron C8 SCT (1991 model) Losmandy G-11; Vixen Super Polaris Canon EOS 40D (unmodded); Philips SPC-900NC Webcam Post Extras:       Mike C sage Reged: 03/05/08 Posts: 362 Loc: Cornwall, UK Re: Another M31 ! [Re: Mike C]       #3404162 - 10/22/09 01:17 PM Attachment (1 downloads) Edit   Reply   Quote Quick Reply   Ok, I've added some more subs as promised. This now consists of 15 x 2-min, 10 x 4-min and 8 x 5-min exposures at ISO 1000, over 3 nights. Processing was similar to before - although the curves applied were a somewhat different shape (probably). The additional 6 x 5- and 5 x 4-minute subs were taken on Tuesday night under beautifully dark skies that were punctuated by rapidly drifting cloud. Due to cloud interruptions it took over three hours to get those exposures! Thanks for looking! -------------------- Mike Crowle http://www.pbase.com/mcrowle/astrophotography Meade Series 5000 ED Apo 127mm Celestron C8 SCT (1991 model) Losmandy G-11; Vixen Super Polaris Canon EOS 40D (unmodded); Philips SPC-900NC Webcam Edited by Mike C (10/22/09 07:09 PM) Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 14 registered and 6 anonymous users are browsing this forum. 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