· 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 Thomas A Davis professor emeritus Reged: 03/25/05 Posts: 738 M1 With a Visitor       #3401837 - 10/21/09 10:05 AM Attachment (33 downloads) Edit   Reply   Quote Quick Reply   Took this one this morning with the AP180EDT at F/6.9 (AP .75X reducer) and a modded Canon XS at ISO1600. Used a Lumicon Deek Sky filter as well. 6x8 minutes exposures. At the top of the frame, just right of center (North is up in this image), there is an elongated dash, which is the asteroid Fortuna, listed at a visual magnitude of 10.6. I checked this with the minor planet checker. Tom Post Extras:       Miikka Sikkila member Reged: 04/22/09 Posts: 23 Loc: Finland Re: M1 With a Visitor [Re: Thomas A Davis]       #3401852 - 10/21/09 10:13 AM Edit   Reply   Quote Quick Reply   Nice details in this picture! I assume you've cropped it quite abit as I refer the size to my 8" SCT with a reducer which would give a size of your thumbnail for this nebula. Anyways very nice shot and the asteroid Fortuna is good detail too! -------------------- Every morning when the sun goes up, she brings me coffee in my favourite cup! Post Extras:       Thomas A Davis professor emeritus Reged: 03/25/05 Posts: 738 Re: M1 With a Visitor [Re: Miikka Sikkila]       #3401859 - 10/21/09 10:19 AM Edit   Reply   Quote Quick Reply   I cropped it at 100% resolution. The focal length of the 8" SCT with a F/6.3 reducer would be very close to what I get with the AP180 at F/6.9. Thanks, Tom Post Extras:       Thomas A Davis professor emeritus Reged: 03/25/05 Posts: 738 Re: M1 With a Visitor [Re: Thomas A Davis]       #3401891 - 10/21/09 10:40 AM Attachment (11 downloads) Edit   Reply   Quote Quick Reply   Hereis the same shot with some perspective around it. Tom Post Extras:       HHastro sage Reged: 05/22/07 Posts: 242 Loc: Germany, City of Hamburg Re: M1 With a Visitor [Re: Thomas A Davis]       #3401928 - 10/21/09 10:55 AM Edit   Reply   Quote Quick Reply   Tom: Looks very good with lots of details in the filament structure. Perfect image! Bruno -------------------- Meade 12" ACF with GEG f-6.5, 2000mm, TAK e200 f-4, 800mm, 4" Genesis f-5, Canon EOS 20 Da, EOS 350 D (both modded) ST10XM w/CFW8, guidecam at GEG: ST2000XM Mount: Mauz Mam 100. Post Extras:       Thomas A Davis professor emeritus Reged: 03/25/05 Posts: 738 Re: M1 With a Visitor [Re: HHastro]       #3402073 - 10/21/09 12:23 PM Edit   Reply   Quote Quick Reply   Thanks Bruno. I've tried this before without a filter, and really think the filter brings out the filaments much more clearly. Judging by the histogram, I think I can about double the exposure time and not have a background problem. I hope to try that later on. Tom Post Extras:       Dan478 super member Reged: 10/30/08 Posts: 141 Re: M1 With a Visitor [Re: Thomas A Davis]       #3402225 - 10/21/09 01:41 PM Edit   Reply   Quote Quick Reply   Fantastic shot Tom -------------------- Dan Southern California LX-200 10" Classic Canon 40D (unmodified) Astronomik CLS LP Filter 6.3 Focal reducer Link to my observatory and imaging site: http://dansastroimages.blogspot.com/ Post Extras:       Thomas A Davis professor emeritus Reged: 03/25/05 Posts: 738 Re: M1 With a Visitor [Re: Dan478]       #3402271 - 10/21/09 02:10 PM Edit   Reply   Quote Quick Reply   Thanks Dan. Tom Post Extras:       Nils_Lars Post Laureate Reged: 01/04/08 Posts: 3410 Loc: Santa Cruz Mountains , CA Re: M1 With a Visitor [Re: Thomas A Davis]       #3402548 - 10/21/09 04:14 PM Edit   Reply   Quote Quick Reply   Sweet shot you got there and the asteroid is the icing on the cake , well done Tom. -------------------- Erik Orion Atlas Self Hypertuned (EQMOD) Orion ED 80 Williams Optics VII reducer Celestron 8" SCT Orion Starshoot Autoguider PHD guide Canon 400D Hap Griffin Mod w/Baader filter Astronomik clip-in LP filter and 12nm Ha Stilleto CVF and Bahtinov mask Tamron 75-300mm&28-80mm lenses NexImage webcam http://www.flickr.com/photos/31986095@N05/ Post Extras:       davidc sage Reged: 11/24/05 Posts: 261 Loc: Mesa, Arizona Re: M1 With a Visitor [Re: Thomas A Davis]       #3402667 - 10/21/09 05:15 PM Edit   Reply   Quote Quick Reply   Tom, That is a terriffic image of M1 the Crab and the asteroid that you have done. Great details and colors of the core. Keep the great work coming. David -------------------- 13.1 Inch-F/4.8 Royce Conical Homebuilt Dob 8 Inch-F/5 Orion Dob 4 Inch Celestron Reflector Camping Scope 25mm Meade W/A Ep 13mm Orion Stratus Ep 8mm Orion Stratus Ep 2X Meade Barlow Meade Cheshire/Sight Tube East Valley Astronomy Club Searching For Rainbows In The Dark Post Extras:       David Pavlich Postmaster Reged: 05/18/05 Posts: 8655 Loc: Mandeville, LA USA 30.22 X 90.... Re: M1 With a Visitor [Re: Thomas A Davis]       #3402710 - 10/21/09 05:32 PM Edit   Reply   Quote Quick Reply   Great shot with a terrific bonus! David -------------------- Proud Member; PAS NOLA, "If we knew what we were doing, it wouldn't be called research..." A. Einstein Post Extras:       Thomas A Davis professor emeritus Reged: 03/25/05 Posts: 738 Re: M1 With a Visitor [Re: David Pavlich]       #3403035 - 10/21/09 08:28 PM Edit   Reply   Quote Quick Reply   Thanks everyone. I'll try to see if I can get more data on this later on. Tom Post Extras:       Star surfer8 super member Reged: 05/15/06 Posts: 493 Re: M1 With a Visitor [Re: Thomas A Davis]       #3403153 - 10/21/09 09:23 PM Edit   Reply   Quote Quick Reply   Nice shot. Good details. -------------------- Tom Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 24 registered and 13 anonymous users are browsing this forum. 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