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GeorgeNC
Pooh-Bah
Reged: 03/26/07
Posts: 1119
Loc: Land of the Sky, North Carolin...
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As I was finishing up shooting some of the nebulosity in Cygnus with my 100mm telephoto lens on the modded Canon 40D the other night I got a few subs of this target as it rose above my neighbor's house. This is ten 210 second subs at ISO 3200. Had the Canon 40D with 100mm f/2.0 lens stopped down to f/2.8 with an Astronomik 13mn Ha clip-in filter mounted side by side with an 80mm Stellarvue Nighthawk II guidescope with SSAG and PHD on a CGEM mount. Processed in PhotoShop CS3 and Carboni's AstroTools.
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Celestron C11 on CGE Mount
Stellarvue 80mm Nighthawk II
W.O. Flt110 on CGEM
Canon 40D (Hap Griffin modified)
Orion StarShoot Autoguider
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s58y
Postmaster
Reged: 12/12/04
Posts: 5494
Loc: Eastern NY
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Nice -- it looks like you captured some of the faint outer wisps here.
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Hutech 30D, SBIG ST-402 autoguider
SV80S, TV102iis
Old camera lenses: 800mm f/5.6, 180mm f/3.4
AP900, Barndoor tracker
http://www.pbase.com/s58y
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Nils_Lars
Post Laureate
Reged: 01/04/08
Posts: 3395
Loc: Santa Cruz Mountains , CA
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This thing is big , I love using the Ha filter for these kind of targets and it is working well for ya.
Maybe a little background noise , I always have to almost double my exposures when I use the Ha filter to get enough signal to keep the noise down.
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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/
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GeorgeNC
Pooh-Bah
Reged: 03/26/07
Posts: 1119
Loc: Land of the Sky, North Carolin...
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Quote:
Maybe a little background noise , I always have to almost double my exposures when I use the Ha filter to get enough signal to keep the noise down.
I went back out Tuesday night to take some more subs, longer exposures at iso800, but my CGEM started acting up. At the most inopportune times it would give me the "No Signal 17" and "No Signal 16". Tried several remedies - changed power sources, plugged the hand controller into the Aux Port, but nothing worked. Didn't want to let the clear skies go to waste (we've had so few here lately!), that even though it was almost midnight by then, I took down the CGEM and set up the CGE. Couldn't mount the camera directly on the mount, so I set it up with the W.O. Flt110 and shot a number of subs through that telescope using the 80mm Stellarvue as the guidescope. The California Nebula is too big for that 110mm refractor even with the 0.8x focal reducer. Managed to get a few subs - 3.5 minute at iso 3200 when I finally gave up at about 2:00 am. Here's what I came up with:
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Celestron C11 on CGE Mount
Stellarvue 80mm Nighthawk II
W.O. Flt110 on CGEM
Canon 40D (Hap Griffin modified)
Orion StarShoot Autoguider
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GeorgeNC
Pooh-Bah
Reged: 03/26/07
Posts: 1119
Loc: Land of the Sky, North Carolin...
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Still haven't gotten the CGEM back from Celestron where I sent it for warranty repairs, but finally figured how to mount the camer and guidescope on the CGE. Went out friday night, mounted the Canon 40D with the Ha filter and the 200mm f/2.8L lens side by side on the CGE with the 80mm Stellarvue Nighthawk II guidescope. This is twelve 270 second subs at ISO 3200 stacked in DSS with twelve darks and twelve flats and processed in PhotoShop CS3:
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Celestron C11 on CGE Mount
Stellarvue 80mm Nighthawk II
W.O. Flt110 on CGEM
Canon 40D (Hap Griffin modified)
Orion StarShoot Autoguider
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quantumac
sage
Reged: 12/17/07
Posts: 385
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Love the contrast. Beautiful!
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Scope: Meade 10" LX200R
Guide/Planetary Camera: Imaging Source DBK41AF02.AS
DSO Camera: QHY8
Guide Hardware: Celestron OAG, Shoestring Astronomy GPUSB
Software: Mac OS X, Starry Night Pro, Nebulosity, PHD Guiding, PixInsight, Astro IIDC. No Windows anything.
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Illinois
professor emeritus
Reged: 12/18/06
Posts: 693
Loc: near Chicago, Illinois USA
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Nice and sharp picture!
Is that possible to get faint Calfornia Nebula on DSLR without filter?
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Astronomer since 1975!
Orion 80mm ED refractor and
iOptron CubePro mount
Meade 16" Lightbridge Dobsonian
Orion 10" SkyQuest Classic Dobsonian
Tele Vue Eyepieces
Canon EOS XS 1000D
Orion Planetary 5 mm and
Orion Expanse Wide-Field 6mm eyepiece
4.5" F5 Reflector since 1982!
Orion Narrowband and SkyGlow filters
Member of IDA, let's fight light pollution!
Old Edmund 6"F8...donated to cousins
Super Polaris C8...donated to Byron Observatory in Illinois
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GeorgeNC
Pooh-Bah
Reged: 03/26/07
Posts: 1119
Loc: Land of the Sky, North Carolin...
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Quote:
Is that possible to get faint Calfornia Nebula on DSLR without filter?
I'm not sure - my Canon 40D is modified and for images of nebulae I add the Ha filter. Maybe someone else has tried with a stock dslr.
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Celestron C11 on CGE Mount
Stellarvue 80mm Nighthawk II
W.O. Flt110 on CGEM
Canon 40D (Hap Griffin modified)
Orion StarShoot Autoguider
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justabob
Carpal Tunnel
Reged: 05/05/07
Posts: 1675
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Nice George, I just finished processing mine.
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http://www.pbase.com/rkn/astro&page=all
Vixen Sphinx SXW
Meade sn6
Canon EF 200mm f/2.8L II USM Lens
Hutech 1000d
Self modded 350d
ST8300c on order
DSI PRO II
Bob
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Nils_Lars
Post Laureate
Reged: 01/04/08
Posts: 3395
Loc: Santa Cruz Mountains , CA
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Both of those show some real detail in the top which is what makes this one such a cool target IMHO , well done George.
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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/
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