John Miranda
member
Reged: 09/13/09
Posts: 43
Loc: Oro Valley, Arizona
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This morning's shot, this composite made from 4 exposures at 20 Secs, ISO 1600, then 2 at 5 Secs, and 1 at 2 secs.
I used a Celestron CPC 1100 + Hyperstar.
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John Miranda
www.johnmiranda.com
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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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That came out really nice! I wonder if you added, say, 4X30 second lights, the outer faint nebulosity would be much more evident? With the short lights you did, you'd be able, as you've done here, eliminate the dreaded core blowout.
Anyway, a really nice image!
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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Nils_Lars
Post Laureate
Reged: 01/04/08
Posts: 3459
Loc: Santa Cruz Mountains , CA
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Wow 20 sec , that Hyperstar is just so dang cool.
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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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Javier1978
sage
Reged: 02/12/09
Posts: 229
Loc: Buenos Aires, Argentina
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Amazing the data you got with 20 sec!
Very well done.
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6" f5 Sky Watcher Reflector
Eq3 mount (Dual Axis)
Unmodded Canon 300 D
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JPGriffin
member
Reged: 05/13/09
Posts: 37
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How did you combine the short with the long? I have some 30 sec Hyperstar exposures using a Nexstar 11 GPS as well as some 10, 8, and 5 second exposures that have fairly nice core detail. I would love to get these images together but I can't seem to combine them in the correct way.
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villaltame
member
Reged: 09/17/09
Posts: 36
Loc: Cartago, Costa Rica
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That is a great image John, running man looks very, very nice.
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Meade LX90 8" ACF
Nikon D80
My astrophoto blog
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John Miranda
member
Reged: 09/13/09
Posts: 43
Loc: Oro Valley, Arizona
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Thank you everyone. David, you inspired me to add 4 more 20 second subs that were taken last night and align those as well. so now I have 8 x 20 second subs + 2 x 5 seconds + 1 x 2 seconds.
Here is the revised image, as per David's suggestion, and I think it reveals more nebula detail. Do you all prefer the first or second version?
JPGriffen - Regarding your question - I use Photoshop CS4, I open the base image (long exposures). I then open the short exposure image, copy, then paste as a new layer onto the base image document. At this point, they need alignment: I set layer blending mode to 'difference' to easily see mis-registration, then use free transform to align the two layers (I shot this in Alt-AZ).
Once registered, I reset layer blending back to 'normal'.
Next you want to hide the low exposure image except for the center, blown out area. To do this, click on your 'low exposure layer' which should be on top, then under "Layer" menu, select Layer Mask, "Hide All". This completely hides your low exposure version.
Next, click on your mask, use the brush, don't make it too small, maybe ~20-50 pixels, select white color, set opacity to maybe 15-20% and start revealing the 'darker' center by clicking on the center image area. A last step is use gaussian blur to make your blending more natural. Sorry for all the steps, but this is how I do it. Maybe there are other better ways...
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John Miranda
www.johnmiranda.com
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lawrie
Carpal Tunnel
Reged: 01/31/06
Posts: 1744
Loc: Okanagan Valley
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Great image, a real vote for hyperstar.
How did you focus at that narrow a depth of focus?
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Clear Skies
Lawrie
Ultima 8
Atlas EQ-G
ZenithStar 80 FD
DSI Pro - Pro II
Canon 350D
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bardo
member
Reged: 09/13/09
Posts: 54
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wow i want a hyperstar!!
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mclewis1
Thread Killer
Reged: 02/25/06
Posts: 3961
Loc: New Brunswick, Canada
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If that doesn't sell a bunch of Hyperstars I don't know what will.
20s exposures in Alt Az mode ... very nice work John.
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Mark
C11, C6, APM/TMB115, and AT80ED - Tandem mount CGE and CG-5A, WO EZ-Touch and AT Voyager
25x100s and 8x56s, T-Mount Light, Mark 1 eyeballs - Modded 350D, DSI-P, SPC900, Mallincam
Just because you can doesn't necessarily mean that you should
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John Miranda
member
Reged: 09/13/09
Posts: 43
Loc: Oro Valley, Arizona
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Thank you!
My DSLR has a 'live view' mode, so I plug it via USB into a laptop and use the laptop's display to both align the telescope and focus. I find that by zooming the display, I can achieve really good focus. I find this mode extremely helpful.
Without a live view mode, I would imagine it would be doable but a little more tedious, take a picture, blow it up on a laptop, examine, adjust focus, take another picture, etc...
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John Miranda
www.johnmiranda.com
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JPGriffin
member
Reged: 05/13/09
Posts: 37
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Quote:
Thank you!
My DSLR has a 'live view' mode, so I plug it via USB into a laptop and use the laptop's display to both align the telescope and focus. I find that by zooming the display, I can achieve really good focus. I find this mode extremely helpful.
Without a live view mode, I would imagine it would be doable but a little more tedious, take a picture, blow it up on a laptop, examine, adjust focus, take another picture, etc...
Thanks for the reply about the 'core correction.' My 5DM2 has live view as well but I never thought to use it for focusing. I currently use Nebulosity and try to get my Half Flux Radius (HFR) as close to '1' as possible. If you are using magnified live view, can you use a large target like Jupiter or do you go to the object that you want to image and try to focus from there?
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bryansay
super member
Reged: 02/25/09
Posts: 111
Loc: Georgetown, TX
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Wow, very nice, especially after the additional short subs.
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Bryan Sayler
Celestron C9.25; Orion ED80
HEQ-5; Orion ST-80 w/starshoot
Nikon D80; Canon 40D Hap Griffin Mod
Empty Wallet 
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waassaabee
Carpal Tunnel
Reged: 11/26/07
Posts: 2710
Loc: Central California Coast
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All you need now is a frame!! Excellent image. 
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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
Canon 350D Hap Griffin Baader mod - o.o
My Friend Flickr
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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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Stunning and a testament to all Hyperstars claims.
To get that level of detail in just a few minutes exposure is remarkable! Every imager should have one!
Now... there's just the small problem... of price 
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DSLR AstroMod
DSLR filter removal and replacement packages
http://www.dslrastromod.co.uk
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John Miranda
member
Reged: 09/13/09
Posts: 43
Loc: Oro Valley, Arizona
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Hi JP Griffin, when connecting your DSLR to your laptop In live view mode, you can focus using any bright star. Being slightly off focus will immediately enlarge the star's size on the laptop's monitor. I imagine something like Jupiter would work well.
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John Miranda
www.johnmiranda.com
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