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Archive 2009 · Neighboring Galaxies

  
 
Andrew Welsh
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p.1 #1 · Neighboring Galaxies


Hi there, I normally post in the wedding / people / gear forums, but occasionally I take an astrophoto-- far fewer with twin 8 month olds and a 22 month old though!

These are our neighboring galaxies, M31 (Andromeda) and M33 (Pinwheel). Taken with 40D and 35L @ f/5.6, ISO 1600, 43 x 180s exposures. Andromeda is about the size of 3 full moons in the sky, to give a sense of scale. The links to the images are other astrophotos I took with a 400mm and 300mm lens, respectively.
http://astro.welsh-house.net/img/m31-m33-1000px-labels.jpg
(same as above but without labels)
(full res for those who want to swim around)



Nov 24, 2009 at 10:24 PM
Andrew Welsh
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p.1 #2 · Neighboring Galaxies


Nearly 100% crops of the above objects of interest...

http://astro.welsh-house.net/img/m31-m33-crop-labels.jpg



Nov 24, 2009 at 10:26 PM
redsoxdesign
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p.1 #3 · Neighboring Galaxies


Andrew, this is really interesting...I was just telling someone today how impressed I am with photographers that go to such great lengths to get the shot. I can't even work out how long 43 x 180s is! (Maybe its the longest period of time you get to yourself away from the kids!)
cheers Andrew



Nov 24, 2009 at 10:38 PM
bshamilton
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p.1 #4 · Neighboring Galaxies


Very nice, Andrew. I'm particularly impressed that you got the dust lanes in M31! And the star colors are very nicely captured.
Well done.

Barry



Nov 24, 2009 at 11:03 PM
nugeny
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p.1 #5 · Neighboring Galaxies


Very impressive. But I am lost. Did you use a tracking tripod? What is ;"43 x 180s exposures."


Nov 25, 2009 at 12:27 AM
Andrew Welsh
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p.1 #6 · Neighboring Galaxies



Nugeny, I took 43 pictures (exposures) that were 180 seconds- 3 minutes long each. I used special astrophoto software to stack them together.



Nov 25, 2009 at 07:54 AM
nugeny
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p.1 #7 · Neighboring Galaxies


Andrew Welsh wrote:
Nugeny, I took 43 pictures (exposures) that were 180 seconds- 3 minutes long each. I used special astrophoto software to stack them together.


Thanks. you would mind telling me what soft ware? DSS? I have been wanting to do this kind of photo stacking. BTW, how did you focus? Thanks ahead. Bob



Nov 25, 2009 at 10:27 AM
Andrew Welsh
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p.1 #8 · Neighboring Galaxies


DSS would work, but I used a program called Iris. Both are free- Iris is geekware and much more powerful-- and difficult for newcomers- to use than DSS. I focused using live view and EOS Utility with the camera hooked up to a laptop. The EOS utility software functioned as my timer as well.

Oh and to answer your earlier question, yes I did track.. the camera + lens were mounted piggyback on a Meade LX200 8-inch telescope.



Nov 25, 2009 at 12:10 PM
nugeny
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p.1 #9 · Neighboring Galaxies


Andrew Welsh wrote:
DSS would work, but I used a program called Iris. Both are free- Iris is geekware and much more powerful-- and difficult for newcomers- to use than DSS. I focused using live view and EOS Utility with the camera hooked up to a laptop. The EOS utility software functioned as my timer as well.

Oh and to answer your earlier question, yes I did track.. the camera + lens were mounted piggyback on a Meade LX200 8-inch telescope.


So bad you still have to track. I thought you could just stacking instead of tracking. Years ago back to the dark age before digital area, I used to have a big telescope on top of my house. Well, I don't want to go back there again.
But with a small telescope I think we can do wonderfull things nowadays as your images proved it. You do fine jobs.



Nov 25, 2009 at 01:39 PM
Andrew Welsh
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p.1 #10 · Neighboring Galaxies


you could do a similar shot w/o tracking, but you would be limited to 5-10 sec exposures before you got star trails. My shots were 3 minutes long, and even a fisheye lens would have trails at that long of an exposure.


Nov 25, 2009 at 02:53 PM
davenfl
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p.1 #11 · Neighboring Galaxies


Those are really great astro shots Andrew. 8 month old twins and a 22 month old, congratulations but no wonder you are up taking star pics at night.

Dave



Nov 25, 2009 at 03:00 PM
nugeny
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p.1 #12 · Neighboring Galaxies


Andrew Welsh wrote:
you could do a similar shot w/o tracking, but you would be limited to 5-10 sec exposures before you got star trails. My shots were 3 minutes long, and even a fisheye lens would have trails at that long of an exposure.


Andrew, I lost you. You took 180" to take 43 exposures. So each exp would have lasted 4.1 sec. not 3 minutes. What do I miss here?



Nov 25, 2009 at 03:02 PM
TBannor
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p.1 #13 · Neighboring Galaxies


Very cool. You'll find this interesting:

http://antwrp.gsfc.nasa.gov/apod/ap091125.html



Nov 25, 2009 at 03:13 PM
Andrew Welsh
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p.1 #14 · Neighboring Galaxies


nugeny wrote:
Andrew, I lost you. You took 180" to take 43 exposures. So each exp would have lasted 4.1 sec. not 3 minutes. What do I miss here?

I took a 180 second exposure 43 times. = 129 minutes = 2 hours, 9 minutes total exposure time.



Nov 25, 2009 at 03:27 PM
BKphotography
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p.1 #15 · Neighboring Galaxies


very nice andrew, meant to say how much i liked the long exposure photo you posted on sam's and tony's a coupla days ago.

all the best mate.



Nov 25, 2009 at 03:28 PM
Andrew Welsh
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p.1 #16 · Neighboring Galaxies


TBannor wrote:
Very cool. You'll find this interesting:

http://antwrp.gsfc.nasa.gov/apod/ap091125.html

Thanks. You can see the Andromeda galaxy that is in my photo on the left side below the milky way in that shot.



Nov 25, 2009 at 03:33 PM
Dpic_arctic
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p.1 #17 · Neighboring Galaxies


This is really cool! I like how you identified all a bunch of the galaxies. How did you find NGC 831?


Nov 26, 2009 at 03:03 AM





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