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  #1  
Old 11-11-2008, 10:25 PM
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One hour wide field 450d Milky Way

2 frames 9 minutes 8 seconds at 1600 iso and 6 frames 1 hour 42 seconds at 800 iso with canon 450d no darks stacked...using original 300d lens with no flat field either///stacked in deep sky stacker, minimal process in zoom browser Milky Way with many recognisable objects...

alex
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  #2  
Old 11-11-2008, 10:44 PM
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Kal (Andrew)
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What a pearler Alex, very nice!
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  #3  
Old 11-11-2008, 10:44 PM
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Octane (Humayun)
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Alex,

There is so much potential there.

These types of widefield images have become kind of like your trademark.

I really urge you to take some dark frames (and, perhaps flat fields) to remove the noise (and sort out peripheral illumination issues).

Otherwise, great stuff!

Regards,
Humayun
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  #4  
Old 11-11-2008, 11:00 PM
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Hi Alex,

Thats amazing - no darks or flat fields and heading into summer and long exposures. Obviously darks and flatfields do help but I'm astonished how little noise is evident by what you have shown. (... on the other hand so does extra images). I'm presuming the noise is also not very apparent on the full res image. How was the initial frame on deek sky stacker (since stacking helps too)?

If you are looking to cheat a little you could also use the dynamic background extraction in pixinsight LE (the free version) to help darken the background even further and help with vignetting, not that it looks too bad.

You must be very happy indeed with your new purchase! The colours look great and an amazing shot. Must say it makes a 450D look very tempting.

Cheers
David
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  #5  
Old 11-11-2008, 11:57 PM
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Thanks for the encouragement..
Because I am color blind I can manage happily extreme color.. I have been playing around ,,trying to turn it into a science fiction book cover

alex
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  #6  
Old 12-11-2008, 02:42 PM
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Thats come up great mate...

I agree with Humayun, flats and darks would increase that images appeal.. That being said, its brilliant as is..

I too am color blind (deficient) which makes editing astro images difficult at the best of times.
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  #7  
Old 12-11-2008, 04:11 PM
jase (Jason)
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Alex, the second post has been cooked a little too long IMO - nice effect though. The first post is a real treat. Good job indeed, thanks for sharing.
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  #8  
Old 12-11-2008, 11:49 PM
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Nice one Alex - dramatic!!
Well done
Doug
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  #9  
Old 13-11-2008, 10:23 PM
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Very nice Alex, a wonderfully rich area that you've captured.

Cheers
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  #10  
Old 13-11-2008, 10:52 PM
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Hang on. 1 hr 42 sec frames with no darks on a DSLR ?, umm, really?, could you post one of these unprocessed?.
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  #11  
Old 14-11-2008, 07:28 AM
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Could be 6 frames at a total of 1 hour 42 seconds.

10 mins 7 seconds each?

Michael
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  #12  
Old 14-11-2008, 08:51 AM
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I love wide fields!
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  #13  
Old 14-11-2008, 12:06 PM
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good to see you getting some deep sky work done, being color blind must be a pain in processing, i assume its Red/green given i think 1 in 4 males suffer that problem.
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  #14  
Old 14-11-2008, 12:45 PM
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Quote:
Originally Posted by Bassnut View Post
Hang on. 1 hr 42 sec frames with no darks on a DSLR ?, umm, really?, could you post one of these unprocessed?.
If I can get my email sortted and it has been days now I am happy to send you them if you like...

I stacked a few yesterday...one was 1113 seconds another near that..at 1600 iso, then a couple at 800 of about 400 seconds...anyways my point variying iso s and exposure times and that wonderful deep sky stacker spat out a result... One hour forty minutes all up... I will post it if I dont run out of credit...

AND definetly no darks...actually I will post a single frame of 1113 seconds as well which gives an idea of the sky glow here

alex
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  #15  
Old 14-11-2008, 12:51 PM
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Here you go 1113 seconds and sky glow is becoming a problem
alex
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  #16  
Old 14-11-2008, 12:57 PM
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Here is the multi stack result... one hour forty minutes all up..1113 secs x 2 at 1600...stuff at 800 and even 400 I think..I did not take any notice because I really did not think it would work..the contrast between exposures was rather extreme.. amazing program... still maybe I can stack everything...


alex
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  #17  
Old 14-11-2008, 12:59 PM
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There is an irridium flare up the top.. thats my third by accident.
Alex
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  #18  
Old 14-11-2008, 01:04 PM
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Processing is not a pain for me because I adjust the colors to bring stuff out and to please me... that may and usually is not what should be done but I like the fun side ... some of the stuff I would not show I expect is very extreme.

Thanks everyone for the encouragement.
It was the first night for ages everything was new to me besides the camera... I was just trying to get an idea of what the camera liked and did not like... anyways I have photo shop installed now so I can practice stuff.

alex
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  #19  
Old 14-11-2008, 02:11 PM
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Alex

Well done, thats a very nice wide field. The single subs high background also hides the noise somewhat, and theres a fair bit of noise in the stack too. I think you would be supprised how darks would clean it up, even though you got a good result without them .

What I ment in the previous post was, I thought you had a SINGLE 1hr 42m exposure. Obviously not, its the total exposure time .

Did you find a big difference in noise in the different ISO subs?
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  #20  
Old 14-11-2008, 02:29 PM
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I actually like the sky-glowed 1113s unprocessed exposure over all others... looks awesome.
Am I nuts?
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