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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial 
Thread started 10 Jun 2014 (Tuesday) 23:29
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APOD - Three Galaxies over New Zealand

 
FuzzSummit
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Jun 16, 2014 03:39 |  #16

Saw it on APOD when it was published, didn't know it was a POTN-er! :-) Congrats!
I've been restarting my astrophotography again here in NZ (sold all my astro-specific gear when I moved from Colorado to London). The night sky is amazing here.


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NCHANT
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Jun 16, 2014 15:51 |  #17

FuzzSummit wrote in post #16974256 (external link)
Saw it on APOD when it was published, didn't know it was a POTN-er! :-) Congrats!
I've been restarting my astrophotography again here in NZ (sold all my astro-specific gear when I moved from Colorado to London). The night sky is amazing here.

Thanks! Yes we have awesome skies here, we are hoping to do a trip around the south island in Sept/Oct, can't wait!


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FuzzSummit
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Jun 16, 2014 16:31 |  #18

Question: are these on tracking mounts, or just 20-sec on static tripod and then stitched? I haven't done much wide-field astrophotography, but looking to do some here. Planning to head out to the beach sometime this weekend hopefully for some shots.


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joeblack2022
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Jun 16, 2014 16:39 |  #19

Fantastic!


Joel

  
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NCHANT
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Jun 16, 2014 17:16 |  #20

FuzzSummit wrote in post #16975591 (external link)
Question: are these on tracking mounts, or just 20-sec on static tripod and then stitched? I haven't done much wide-field astrophotography, but looking to do some here. Planning to head out to the beach sometime this weekend hopefully for some shots.

No tracking mount, it's on the list of things to buy but the results I'm getting so far it's probably unnecessary :) good luck! I'm hoping for clear skies this weekend as well.

joeblack2022 wrote in post #16975609 (external link)
Fantastic!

Thank you!


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FuzzSummit
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Jun 16, 2014 17:36 |  #21

NCHANT wrote in post #16975674 (external link)
No tracking mount, it's on the list of things to buy but the results I'm getting so far it's probably unnecessary :)

I'll say!
Btw, do you know anyone who sells AstroTrac or the iOption Skytracker in NZ? I've been interested in those for a quick and easy setup (instead of a full equatorial mount), but haven't found anyone in NZ who carries them.


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NCHANT
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Jun 16, 2014 17:49 |  #22

FuzzSummit wrote in post #16975711 (external link)
I'll say!
Btw, do you know anyone who sells AstroTrac or the iOption Skytracker in NZ? I've been interested in those for a quick and easy setup (instead of a full equatorial mount), but haven't found anyone in NZ who carries them.

get in touch with Jonathan Green: https://www.facebook.c​om ….johnson.921025​64?fref=ts (external link)

I think he knows of someone bringing in the iOptron Skytracker –*that's the one I want to get as well.


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FuzzSummit
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Jun 16, 2014 18:43 |  #23

NCHANT wrote in post #16975733 (external link)
get in touch with Jonathan Green: https://www.facebook.c​om ….johnson.921025​64?fref=ts (external link)

I think he knows of someone bringing in the iOptron Skytracker –*that's the one I want to get as well.

Thanks a lot! I've sent him a message.


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floydbutz4
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Jun 23, 2014 10:29 |  #24

Stunning image. Love to know more regarding composition of the 40 images. I have tried unsuccessfully to do something similar last year when in Big Bend National Park. Thanks.




  
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Jun 24, 2014 08:26 |  #25

floydbutz4 wrote in post #16989414 (external link)
Stunning image. Love to know more regarding composition of the 40 images. I have tried unsuccessfully to do something similar last year when in Big Bend National Park. Thanks.

Yes me too - how do you stitch all the photos together, and correct for distortion (assuming the 24mm has some)?

Fantastic photo, incredibly beautiful.


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Jun 24, 2014 11:45 |  #26

NCHANT wrote in post #16964503 (external link)
Canon 6D
Samyang 24mm ƒ1.4 lens
20 seconds
ƒ3.4
ISO 10,000

This is around 40 photos stitched together :)

Awesome!!!

I have never attempted astro-photography because I don't have the right lens(es), and I don't understand much of the cryptic language used by astro-photogs :)

So if I get this right, you took ~40 shots with the Samyang at 20 seconds each? Why F3.4, if the lens soft(er) at F1.4?

Is there any 'stacking' or each of those shots is an individual part (with certain overlap of course) of the ~40 image pano?

6D's nice with the high ISO; it looks like the noise is quite manageable, is it? Do you use in camera, or do it in post?

Freddy ..


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Jun 24, 2014 17:59 |  #27

floydbutz4 wrote in post #16989414 (external link)
Stunning image. Love to know more regarding composition of the 40 images. I have tried unsuccessfully to do something similar last year when in Big Bend National Park. Thanks.

jroovs wrote in post #16991274 (external link)
Yes me too - how do you stitch all the photos together, and correct for distortion (assuming the 24mm has some)?

Fantastic photo, incredibly beautiful.

Thanks guys, I have attached a screenshot of all the files. I general allow for a fair amount of overlap to get as much data as possible :)

The distortion on the 24mm isn;t very much, I use a lens profile to correct that for easier stitching in Hugin, which does a damn good job of it.

alphamalex wrote in post #16991674 (external link)
Awesome!!!

I have never attempted astro-photography because I don't have the right lens(es), and I don't understand much of the cryptic language used by astro-photogs :)

So if I get this right, you took ~40 shots with the Samyang at 20 seconds each? Why F3.4, if the lens soft(er) at F1.4?

Is there any 'stacking' or each of those shots is an individual part (with certain overlap of course) of the ~40 image pano?

6D's nice with the high ISO; it looks like the noise is quite manageable, is it? Do you use in camera, or do it in post?

Freddy ..

ƒ3.4 (or 3.2 I can't remember) renders the stars very sharp and also adds a diffraction spikes to the brighter points :) you can see a comparison here:

IMAGE: https://farm6.staticflickr.com/5300/14005771906_5c5fa4560d.jpg
IMAGE LINK: https://flic.kr/p/nkDf​2Y  (external link) Samyang 24mm ƒ1.4 Apertures (external link) by Mikey Mack (external link), on Flickr

I don't do stacking for any panoramas, that would essentially triple or more the time it takes to take the shot. I use a very high ISO (10,000 or so) as the 6D handles it extremely well. The noise is very very fine, compared to my 600D at 1600ISO, renders the 600D rubbish :P all noise reduction is done in RAW.

Hope that helps?


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Jun 25, 2014 08:02 as a reply to  @ NCHANT's post |  #28

I'm surprised that you shoot at f3.4, I would thought the more wide open the better, never thought to use my 14mm at anything but 2.8, but makes sense given the 6Ds capabilities at high ISO as you pointed out.

I just want to make sure I understand your workflow as you have described it. You

- use RAW to correct for noise (I'm guessing luminance and color mostly) and make any other adjustments in addition to lens profile correction (curves, saturation etc.)
- then import and stitch together in Hugin.

I'm not familiar with Hugin, I've only used Photoshop Photomerge, does it work basically the same?

Anyhow, thanks for sharing the details of your shooting and post and for providing the screen captures, helps a great deal! :)


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Jun 25, 2014 08:23 |  #29

NCHANT, yer a scholar and a gentleman!! The schooling is much appreciated :)


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Jun 25, 2014 13:27 |  #30

congrats man!! that's mind blowingly incredible!!


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APOD - Three Galaxies over New Zealand
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