Nuno Madeira
Posts: 35
Location: Lisbon, Portugal
Registered: 23 Jul 2009
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Alentejo Night Sky, Portugal
Posted: 27 Sep 2011 at 7:18 GMT
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That's an impressive sky, but slightly marred by the visible seams, perhaps partly due to blending of noise. Sharp edged seams might work better. Also, it looks like the images have been aligned using earthbound features since double images of stars can be seen in the seams. I would try a stitch with control points only on stars, which should align perfectly since they are stationary and free of parallax effects. Blending with Smartblend would be worth trying.
John
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Nuno Madeira
Posts: 35
Location: Lisbon, Portugal
Registered: 23 Jul 2009
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Re: Alentejo Night Sky, Portugal
Posted: 27 Sep 2011 at 10:36 GMT
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Hi Jonh! Thanks for the feedback! I´ve stitched de 6 (around)+ 1 (top) in ptgui in automatic mode, i stiched the top manually. I was wondering why appear the visible seams, i can fixed in photoshop, but i will try stiching again. Alentejo have a great sky, today it´s hard near our cities a place where there is no light.
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iam360Texas
Posts: 298
Location: Fort Worth, Texas, United States
Registered: 12 Jul 2006
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Re: Alentejo Night Sky, Portugal
Posted: 27 Sep 2011 at 14:46 GMT
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Hmm cube face trace line edges. I think this was fixed with Pano2vr version 3.1.0 Rev 1777/4.7.2 August 11, 2011.
If you are using an earlier version... click help 'check for updates'
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Judy-A
Posts: 525
Location: Edmonton, Canada
Registered: 20 Jan 2010
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Re: Alentejo Night Sky, Portugal
Posted: 27 Sep 2011 at 16:32 GMT
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Pretty stars, but also pretty noisy photos. I’m guessing you used a high ISO setting.
I know how difficult these starry sky panos are, because I’ve been trying lately to get some good results. No luck yet.
Tonight is new moon, so it’s a perfect time to try. (Sept. 27, 2011)
Judy
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Alentejo Night Sky, Portugal
Posted: 27 Sep 2011 at 17:35 GMT
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iam360Texas said: Hmm cube face trace line edges.
There are 6 seams horizontally here, so they cannot be cube edges.
John
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Nuno Madeira
Posts: 35
Location: Lisbon, Portugal
Registered: 23 Jul 2009
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Re: Alentejo Night Sky, Portugal
Posted: 28 Sep 2011 at 10:40 GMT
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Hi!
iam360texas :
Yes, i have the latest pano2vr 3.1.0, 1777M/4.7.2 August 11, 2011. I think it´s in stitching in Ptgui ( 9.1 beta 3), and the photos are so dark that can be dificult to the program do it correctly, i think this is the issue.
I need to spend more time in the pano.
Judy-A
I agree with you Judy, there is a lot of noise. i used in the experience 2 iso´s 3200 and 6400 (6400 tested). I use smart sharpen (photoshop) to make more visible stars and brighten. to capture the Milky Way need a higher iso whith the tokina 10-17mm, it´s a F3.5 . It´s not a good lens to do this. I´m looking for the Tokina 11-16 (f2.8), think will have better results.
Share you experience judy, it´s a diferent panos and to do with quality it´s a lens question and body, i´ve the 60D, think the 5D it´s less noiser.
Anyone have a good kit, opinion or examples with 360º star panos?
Jonh
yea jonh, i think it´s ptgui confused stitching them.With time I will sitch again and spend more time fixing the error. I will post here.
Question,
anyone make panos with the Tokina 11-16mm, 2.8?
Thnks for the feedback!
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jannefoo
Posts: 59
Location: Finland
Registered: 3 Jun 2009
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Re: Alentejo Night Sky, Portugal
Posted: 30 Sep 2011 at 20:33 GMT
updated: 30 Sep 2011 at 20:33 GMT
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I shoot with aforementioned Tokina. It's great lens for lowlight stuff, the image quality is pretty even not counting the extreme corners of the image. There's some CA and vignetting but those can be corrected in software. Samyang's fisheye has so much spherical aberration wide open that it's not good for nocturnal shooting.
One example from last Tuesday shot with Tokina 11-16mm: www.360cities.net/image/revontulia-27-09-2011 (f2.8, ISO200ish, 30 seconds, two rows at 11mm and a zenith image)
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DemonDuck
Posts: 312
Location:
Registered: 10 Mar 2011
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Re: Alentejo Night Sky, Portugal
Posted: 30 Sep 2011 at 21:55 GMT
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Maybe try one with soft feathering. It does wonders for ordinary skys.
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Nuno Madeira
Posts: 35
Location: Lisbon, Portugal
Registered: 23 Jul 2009
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Re: Alentejo Night Sky, Portugal
Posted: 30 Sep 2011 at 23:48 GMT
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Wow so nice Janne! You live in a country where auroras are like clouds in Portugal  Grate result in iso 200! With the tokina 11-16mm you take 6 shot´s around 1 top , and two floor like tokina 10-17? I want to buy this lens ( tok 11-16) and i don´t know if works good with automatic stich in ptgui. Tell me your experience.
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jannefoo
Posts: 59
Location: Finland
Registered: 3 Jun 2009
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Re: Alentejo Night Sky, Portugal
Posted: 1 Oct 2011 at 7:36 GMT
updated: 1 Oct 2011 at 7:37 GMT
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8 images and two rows at 45 degree pitch, overlap will be very small but manageable. Of course, smaller pitch and a separate zenith shot will yield in a bigger overlap.
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Nuno Madeira
Posts: 35
Location: Lisbon, Portugal
Registered: 23 Jul 2009
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Re: Alentejo Night Sky, Portugal
Posted: 2 Oct 2011 at 15:38 GMT
updated: 2 Oct 2011 at 15:39 GMT
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Thnks janne. It´s possible make with tokina @ 11mm make 6 around , 1 zenit and 2 nadir? like the fishe eye tokina @ 10.
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