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FORUMS Photography Talk by Genre Astronomy & Celestial Talk 
Thread started 07 Oct 2009 (Wednesday) 02:11
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Intro to image stacking: Step-by-step

 
A.S.I.G.N. ­ Observatory
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Oct 07, 2009 02:11 |  #1

Like a lot of astrophotographers, I get repeated questions on how to do things that although may seem simple, I have to remind myself that they were once beyond me...

So last night, I sat up all night and stacked some images in Deep Sky Stacker, taking screenshots all the way and writing down what I did as I went.

Hopefully this can answer a lot of questions and get the new blood in the game well on their way to adding to the richness of images proliferating amateur astronomy.

http://www.asignobserv​atoryii.com/tutorials.​htm (external link)

Have a crack, enjoy and let's see what you new folks can do!!! YEEEHHARRR!

P.S. There have been a number of enquiries on this thread about star-trail software and problems. This article is written about DEEP SKY STACKER. If you are having issues with startrails.de, StarStax and other programs, please start another thread where others may be able to help you. Please keep your queries in this thread on topic.

Baz.:cool:


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Adrena1in
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Oct 07, 2009 03:41 |  #2

Thanks for taking the time to do this Baz. I've used DSS many times now, so I know how to stack images without really thinking twice, but I've not really got much of an idea what all the options and settings do, so hopefully your guide will made good reading for someone like me, just as much as for a complete beginner.


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A.S.I.G.N. ­ Observatory
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Oct 07, 2009 04:24 |  #3

No worries mate, I hope it helps you out...


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jgrussell
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Oct 07, 2009 09:26 |  #4

Filed away for the day I get to an area without so much light pollution...


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VIGER
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Oct 07, 2009 09:29 |  #5

Very generous of you.

Cheers

Michel


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hollis_f
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Oct 07, 2009 10:11 |  #6

Great summary. I can't wait to try my 7D at ISO6400. All I need is for this damn rain to go away.


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Harm
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Oct 07, 2009 11:55 |  #7

Thank you for an excellent thread - this should be made a sticky


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Jeff
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Oct 07, 2009 14:35 |  #8

Thanks so much! I restacked an M31 image from a few months ago and WOW! What a difference.


Jeff
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A.S.I.G.N. ­ Observatory
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Oct 08, 2009 03:20 |  #9

My extreme pleasure folks! Now let's see you do your stuff!!!

Cmon Jeff...where is it!!!???


Baz.


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Jeff
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Oct 08, 2009 07:33 as a reply to  @ A.S.I.G.N. Observatory's post |  #10

I'm glad I hung on to the raw files from a couple of months ago. A stack of 50 59sec images at f/2.8, along with 10 darks.

Before:

IMAGE: http://www.seivertfamily.com/POTN/M31_A.jpg

After:
IMAGE: http://www.seivertfamily.com/POTN/M31_B.jpg

Jeff
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Astrophotograpy: QHY9M, Optolong LRGB filters, Meade 10" SCT, Orion EON 110mm APO, Atlas EQ-G to keep it all off the ground.
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hollis_f
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Oct 08, 2009 08:20 |  #11

Jeff wrote in post #8783569 (external link)
I'm glad I hung on to the raw files from a couple of months ago. A stack of 50 59sec images at f/2.8, along with 10 darks.

OK, that's exactly what I want to do. And I'll be happy if it's half as good. Just two questions -

What focal length? I know M31 is bigger than what you can see if the naked eye or bins, but I'd assumed you needed something reasonably long. But the amount of trailing you've got on 59 second exposures looks like it must have been fairly wide.

Second question? What's the best way to get a good focus - AF on a bright star; AF on a distant terrestrial object; MF (with liveview)?


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VIGER
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Oct 08, 2009 08:41 |  #12

Good stuff Jeff

Question:

50 59sec images at f/2.8

You mean 50 X 59 sec that's almost an hour.


Michel
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Harm
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Oct 08, 2009 09:23 |  #13

correct...


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Adrena1in
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Oct 08, 2009 09:35 |  #14

hollis_f wrote in post #8783715 (external link)
What focal length? I know M31 is bigger than what you can see if the naked eye or bins, but I'd assumed you needed something reasonably long.

200mm to 500mm I'd say. Much longer and it won't fit in the frame.

hollis_f wrote in post #8783715 (external link)
But the amount of trailing you've got on 59 second exposures looks like it must have been fairly wide.

With a good tracking mount you should be able to go as long as possible and get little or no trailing. With no mount you'd get trails in about 3 seconds at 200mm+

hollis_f wrote in post #8783715 (external link)
Second question? What's the best way to get a good focus - AF on a bright star; AF on a distant terrestrial object; MF (with liveview)?

Good luck using AF on a bright star. I always use MF for astrophotography, even on the moon.


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Jeff
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Oct 08, 2009 10:07 |  #15

Yes to pretty much all of it. 50 individual 59sec images. It was taken with a 50D & Sigma 70-200 lens at 200mm and f/2.8. The whole thing was piggybacked on a 10" LX200 GPS for tracking. Not polar mode, so there is a little field rotation. I cropped off about 10% of the edges. Manually focused via live view (10x) on a bright star nearby then moved over to M31.

VIGER wrote in post #8783804 (external link)
Good stuff Jeff

Question:

You mean 50 X 59 sec that's almost an hour.

Adrena1in wrote in post #8784076 (external link)
200mm to 500mm I'd say. Much longer and it won't fit in the frame.

With a good tracking mount you should be able to go as long as possible and get little or no trailing. With no mount you'd get trails in about 3 seconds at 200mm+

Good luck using AF on a bright star. I always use MF for astrophotography, even on the moon.


Jeff
70D | Tokina 12-24 | Tamron 17-50 f/2.8 | Canon 28-135 IS| 430EX
Astrophotograpy: QHY9M, Optolong LRGB filters, Meade 10" SCT, Orion EON 110mm APO, Atlas EQ-G to keep it all off the ground.
MY AIRPLANE PICS (external link) | MY ASTRO PICS (external link)

  
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Intro to image stacking: Step-by-step
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