Mike Clemens
Post Laureate
Reged: 11/26/05
Posts: 4289
Loc: Wasilla, Alaska 61N
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This is a challenging object for me to process.
This is (10) x 15mins at ISO1600
(TEC 200ED and EOS 40D)
Looking forward to adding more time tonight I hope. This is my first time using 15 minute frames @ ISO1600. Average background at 15 mins/ISO1600 is about 1480 counts. I guess I've got room to go longer, but I'd need to work out focus drift due to temperature.
Mike
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Rankinstudio
sage
Reged: 04/05/08
Posts: 425
Loc: Salt Lake City, UT, Lake Powel...
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Good job, the core in this one is really bright o.O
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David Rankin
http://www.rankinstudio.com
Astro Gallery
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Baader MPCC
Quickcam pro 9000 (guider, imager)
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SGT500
Carpal Tunnel
Reged: 10/03/06
Posts: 2924
Loc: Ny
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WOW!
Awesome closeup of 7331. one of the best ive seen
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-Sal
AstroTech Ritchey Chretien 8"
Williams Optics Zenithstar 80
Orion Atlas Eq-G
Hap Griffin Modified Canon Eos Xs (1000D)
My Astrophotography Gallery
My Sketch Gallery
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QueueCT
super member
Reged: 06/25/08
Posts: 100
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Um, wow. The 15min subs really make a difference.
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Mike Clemens
Post Laureate
Reged: 11/26/05
Posts: 4289
Loc: Wasilla, Alaska 61N
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1x1 sensor scale
http://www.scopenews.com/astrophotos/galaxies/ngc7331.jpg
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waassaabee
Carpal Tunnel
Reged: 11/26/07
Posts: 2710
Loc: Central California Coast
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That's a beauty Mike!! Nice detail and the neighbors poking their head over the fence...
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Gary
34N 120W
-My kingdom for blue squares!-
WO Megrez 90FD/TV 0.8x FR/FF
AT8RC
mini Borg 50/Q-Guide/PHD
CGEM
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My Friend Flickr
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DHB001
super member
Reged: 07/07/09
Posts: 145
Loc: The Netherlands
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Excellent shot! Already a winner imho.
You're quite a productive imager btw, Mike. Do you regularly get a lot of clear nights up there in Alaska?
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Regards,
Boy
C6 SCT @ AS-GT mount
SW 70/500 guide scope
Canon Rebel XS / EOS 1000D, self modded
Astronomik CLS EOS clip filter
Orion SSAG, PHD guide
Bahtinov focusing mask
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Star surfer8
super member
Reged: 05/15/06
Posts: 494
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Nice work. Good details of the dark stuff.
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Tom
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Mike Clemens
Post Laureate
Reged: 11/26/05
Posts: 4289
Loc: Wasilla, Alaska 61N
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Thanks.
> You're quite a productive imager btw, Mike.
> Do you regularly get a lot of clear nights up there in
> Alaska?
Not really lately. I do usually take about 5-6 hours exposures on nights that work though. That number may go up to 8 or 10 hours as Winter tightens its grip.
I usually start on an object 2 hours before the meridian and then stop 2 hrs after meridian, then switch objects. I think I've done about 5 or 6 objects in the last couple months.
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David Pavlich
Postmaster
Reged: 05/18/05
Posts: 8687
Loc: Mandeville, LA USA 30.22 X 90....
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Another very nice galaxy, Mike!!
David
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Proud Member; PAS NOLA,
"If we knew what we were doing, it wouldn't be called research..."
A. Einstein
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Stardaug
professor emeritus
Reged: 08/03/08
Posts: 531
Loc: Ontario, Canada
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Outstanding imaging and processing once again!
Cheers.
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"Keep looking up!"
Shawn / Ontario, Canada
Celestron CPC800 SCT w/XLT & GPS // Skywatcher Equinox 80ED F6.25 500mm APO // Canon Rebel 350XT unmodded // Milburn EQ Wedge (a Meade model modified to fit my CPC)
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nickatnight
Carpal Tunnel
Reged: 04/14/08
Posts: 1751
Loc: Santa Clarita, CA (LA Suburbs)
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Now that's a party. Beautiful. Nice work Mike.
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nickatnight
Celestron CPC 9.25" GPS
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Meade s5000 18mm UWA, Meade 6.7mm UWA,
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bardo
member
Reged: 09/13/09
Posts: 54
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wow. i really like the core. very well done!!!
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Nils_Lars
Post Laureate
Reged: 01/04/08
Posts: 3459
Loc: Santa Cruz Mountains , CA
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Superb image of this galaxy , another great one Mike.
15min subs , yikes its must have been cool temps to keep the sensor from pushing a bunch of noise into the shot.
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Erik
Orion Atlas Self Hypertuned (EQMOD)
Orion ED 80
Williams Optics VII reducer
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Stilleto CVF and Bahtinov mask
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NexImage webcam
http://www.flickr.com/photos/31986095@N05/
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Mike Clemens
Post Laureate
Reged: 11/26/05
Posts: 4289
Loc: Wasilla, Alaska 61N
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Thanks! Yes its below freezing now or right around there. Subs are getting quieter.
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KevinUK
Vendor (DSLR-AstroMod)
Reged: 08/22/07
Posts: 720
Loc: N 51'53 W 00'25
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Mike fantastic image, you've resolved 7331 beautifully, just amazed at the level of detail captured.
What scope are you using and imaging device?
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DSLR AstroMod
DSLR filter removal and replacement packages
http://www.dslrastromod.co.uk
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Mike Clemens
Post Laureate
Reged: 11/26/05
Posts: 4289
Loc: Wasilla, Alaska 61N
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Thanks, this is EOS 40D unmodified with a TEC 200 f/9 refractor and field flattener.
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planetman83
member
Reged: 09/17/07
Posts: 57
Loc: Greece-Crete
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Awesome!
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Mobius1
professor emeritus
Reged: 08/28/05
Posts: 700
Loc: Madison, WI / Gurnee, IL
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Love it! And you got so many other fuzzies in there 
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Martin
William Optics 66SD
Orion 100ED
Orion 120-ST EQ
PST-Ha
Celestron CGE 1100
Canon Rebel XSI with Astronomik filters
DSI-IIC
Homemade spectroscope in progress...
Yerkes Observatory Volunteer
(24" Cass on weekends)
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KevinUK
Vendor (DSLR-AstroMod)
Reged: 08/22/07
Posts: 720
Loc: N 51'53 W 00'25
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Quote:
Thanks, this is EOS 40D unmodified with a TEC 200 f/9 refractor and field flattener.
Oddly, I imaged the exact same target a few weeks back with a C9.25 @ f/10 and 450D, almost same integration time, 2hr15mins.
FOV should be very similiar, yet 7331 is no where as large as yours in my original image??
Not taking anything away from your wonderful image, but anyone who says dark skies don't help are fooling themselves!
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DSLR AstroMod
DSLR filter removal and replacement packages
http://www.dslrastromod.co.uk
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Mike Clemens
Post Laureate
Reged: 11/26/05
Posts: 4289
Loc: Wasilla, Alaska 61N
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Your image is scaled down right?
In regards to the 450D, pixels are smaller and your scope is longer focal length so that image ^ has to be scaled down. This is sensor scale for me ( 0.654" / pixel ) http://www.scopenews.com/astrophotos/galaxies/ngc7331.jpg and if I had used a EOS 450D it would be at .6" / pixel or so, even bigger.
That night I took that was as about as dark as it gets here.
Thanks for your comments I would like to understand also.
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lineman_16735
Tak-o-holic
Reged: 12/04/04
Posts: 2604
Loc: Central PA
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Nice image Mike. Have you stopped using your CCD...ST402? I hope not I really enjoyed the few PN you did last season.
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Chris
A mount from Illinois
A scope from Japan
A camera from Cal-I-Fornia
A dog from Kentucky
A wife and kids from the "Twilight Zone"
The Geek Shed
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Mike Clemens
Post Laureate
Reged: 11/26/05
Posts: 4289
Loc: Wasilla, Alaska 61N
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Hello, yes I have stopped the CCD. (Though my results from it are typically sharper looking than the DSLR.) it is an ST237 by the way, not no fancy new model : )
Here is an update - this is now 27 images of 15 minutes each, run through DDP.
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historius apochromaticus
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KevinUK
Vendor (DSLR-AstroMod)
Reged: 08/22/07
Posts: 720
Loc: N 51'53 W 00'25
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Oh wow Mike , super stuff!
7331 is one of my fav targets, not an easy one for sure, but when those pesky dust lanes start showing through nicey and in detail it sure makes it all the more worthwile! 
Very nice indeed mate!
p.s i added another hours data to my original will be posting it up shortly, much improved, and yes goiing deeper with 10-15min subs is probably the way to go with this baby. 
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Nils_Lars
Post Laureate
Reged: 01/04/08
Posts: 3459
Loc: Santa Cruz Mountains , CA
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Really awesome shot , this latest one is superb.
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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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xatamec
member
Reged: 09/12/09
Posts: 56
Loc: Catalonia, Spain
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This is an awesome shot! Maybe I miss a bit of color saturation, although that would increase a bit the crominance noise.
Sergi
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My telescopes: WO Megrez 88FD APO and SW 200/1000
My mount: SW EQ6
My cameras: Cooled Canon 350D, QHY5
...and very little time to play with these toys!
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Mike Clemens
Post Laureate
Reged: 11/26/05
Posts: 4289
Loc: Wasilla, Alaska 61N
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Thanks!
Here is 2nd version of all 27 (15) minute frames, this time 1x1 and without DDP.
http://www.pbase.com/mclemens1969/image/118465374/original
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