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shauttra
Joined: 17 Nov 2009
Posts: 778
Location: Latvia
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 Posted: Tue Feb 22, 2011 9:35 pm Post subject: Astro Pano Zenitar 16/2.8 |
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shauttra wrote:
A part of my aurora hunting walk in my village.
Stacked from 5 vertical images. There is still visible stiching places.
ISO 3200, 30 sec, 16mm, f2.8
No auroras 
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Jupiter 37A, Carl Zeiss Sonnar 135/3.5,
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Carl Zeiss Pancolar 50/1.8, Samyang 24/1.4, Auto Vivitar 35/2.8
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arhi_tectu1
Joined: 09 Feb 2009
Posts: 315
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| Posted: Tue Feb 22, 2011 9:44 pm Post subject: |
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arhi_tectu1 wrote:
congratulation very good photo (you will get lucky eventually )
Regards
Catalin
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MF- CZJ 180/2.8@CZJ 50/2.8@Contax CZ 50/1.4@Contax CZ 135/2.8@Nikkor P 180/2.8@Helios 44@Mir 37/2.8@Industar 50/3.5@Pentacon 28/2.8@Pentacon 300/4
AF- Canon 70-200/4L@Canon 60/2.8Macro@Tokina 11-16/2.8
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Spotmatic
Joined: 18 Aug 2008
Posts: 4045
Location: Netherlands
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| Posted: Tue Feb 22, 2011 9:46 pm Post subject: |
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Spotmatic wrote:
I clicked on the picture and wow, what a starry sky! You are a very talented photographer, I'm happy to have you among us
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shauttra
Joined: 17 Nov 2009
Posts: 778
Location: Latvia
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| Posted: Tue Feb 22, 2011 9:46 pm Post subject: |
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shauttra wrote:
| arhi_tectu1 wrote: |
congratulation very good photo (you will get lucky eventually )
Regards
Catalin |
Thanks!
Everything is yet to come
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Mto-1000, Tair-3, Auto Exaktar 135mm 2,8, Samyang 14mm 2.8,
Jupiter 37A, Carl Zeiss Sonnar 135/3.5,
Helios-44, Mir-1, Revuenon 50/1.4,
Carl Zeiss Pancolar 50/1.8, Samyang 24/1.4, Auto Vivitar 35/2.8
www.radosi.lv
http://shauttra.blogspot.com |
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shauttra
Joined: 17 Nov 2009
Posts: 778
Location: Latvia
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| Posted: Tue Feb 22, 2011 9:49 pm Post subject: |
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shauttra wrote:
| Spotmatic wrote: |
| I clicked on the picture and wow, what a starry sky! You are a very talented photographer, I'm happy to have you among us |
I am delighted to be here There is the best company!
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Mto-1000, Tair-3, Auto Exaktar 135mm 2,8, Samyang 14mm 2.8,
Jupiter 37A, Carl Zeiss Sonnar 135/3.5,
Helios-44, Mir-1, Revuenon 50/1.4,
Carl Zeiss Pancolar 50/1.8, Samyang 24/1.4, Auto Vivitar 35/2.8
www.radosi.lv
http://shauttra.blogspot.com |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Tue Feb 22, 2011 9:50 pm Post subject: |
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Attila wrote:
| Spotmatic wrote: |
| I clicked on the picture and wow, what a starry sky! You are a very talented photographer, I'm happy to have you among us |
+10
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kds315*
Joined: 12 Mar 2008
Posts: 16628
Location: Weinheim, Germany
Expire: 2021-03-09
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| Posted: Tue Feb 22, 2011 10:08 pm Post subject: |
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kds315* wrote:
Very well done (even without aurora)!!
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Scheimpflug
Joined: 06 Feb 2010
Posts: 1888
Location: New Zealand / USA
Expire: 2011-11-18
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| Posted: Wed Feb 23, 2011 12:28 am Post subject: Re: Astro Pano Zenitar 16/2.8 |
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Scheimpflug wrote:
| shauttra wrote: |
Stacked from 5 vertical images. There is still visible stiching places.
ISO 3200, 30 sec, 16mm, f2.8 |
High-ISO stitching can be problematic, and sometimes stitching them can be counter-intuitive.
The biggest giveaway for the stitch lines is banding, and the reason you get banding is because the stitchers automatically blend a somewhat wide region between adjacent images to mask the stitch line and balance any exposure differences.
With normal images this works great the majority of the time. What causes problems with high-ISO images is that this blending is effectively layering & averaging images, which is a very effective method for reducing random image noise. So you have a large image with normal high-ISO noise, but with bands which have less noise.
So the trick is to adjust the stitching settings so that the blend width is very very small, just a few pixels, or perhaps even zero so that the images are hard-cut. This also requires that the images be well-corrected for exposure, color, and vignetting... and very precisely aligned so that the edges match, as the blend region won't hide these problems.
Hope that helps. Your photo is fantastic by the way. 
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Parts Lenses: Nikon 35-135/3.5-4.5 (F), Sigma 70-210/4.5 (F), Nikon 50/1.8 Series E (F) |
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shauttra
Joined: 17 Nov 2009
Posts: 778
Location: Latvia
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| Posted: Wed Feb 23, 2011 5:43 am Post subject: Re: Astro Pano Zenitar 16/2.8 |
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shauttra wrote:
| Scheimpflug wrote: |
| shauttra wrote: |
Stacked from 5 vertical images. There is still visible stiching places.
ISO 3200, 30 sec, 16mm, f2.8 |
High-ISO stitching can be problematic, and sometimes stitching them can be counter-intuitive.
The biggest giveaway for the stitch lines is banding, and the reason you get banding is because the stitchers automatically blend a somewhat wide region between adjacent images to mask the stitch line and balance any exposure differences.
With normal images this works great the majority of the time. What causes problems with high-ISO images is that this blending is effectively layering & averaging images, which is a very effective method for reducing random image noise. So you have a large image with normal high-ISO noise, but with bands which have less noise.
So the trick is to adjust the stitching settings so that the blend width is very very small, just a few pixels, or perhaps even zero so that the images are hard-cut. This also requires that the images be well-corrected for exposure, color, and vignetting... and very precisely aligned so that the edges match, as the blend region won't hide these problems.
Hope that helps. Your photo is fantastic by the way. |
Lot of new info!
Thanks!!
_________________
Mto-1000, Tair-3, Auto Exaktar 135mm 2,8, Samyang 14mm 2.8,
Jupiter 37A, Carl Zeiss Sonnar 135/3.5,
Helios-44, Mir-1, Revuenon 50/1.4,
Carl Zeiss Pancolar 50/1.8, Samyang 24/1.4, Auto Vivitar 35/2.8
www.radosi.lv
http://shauttra.blogspot.com |
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