Alexis Hadjisoteriou
Posts: 8
Location: london, United Kingdom
Registered: 4 Dec 2006
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Sigma 8mm vs Sigma 10-20
Posted: 14 Mar 2007 at 22:14 GMT
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I own a Canon 30D and a Sigma 8mm for pano work. I recently bought a Sigma 10-20 for wide angle work and have been impressed with the quality of this lens. I am also looking at consolidating my lens collection and wondered how suitable this lens (10-20) would be for pano work. The software I use is PTGui on a Windows PC.
Anyone have any views or experiences to share.
regards
alexis
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John Houghton
Posts: 2317
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Sigma 8mm vs Sigma 10-20
Posted: 15 Mar 2007 at 20:28 GMT
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Alexis, As you probably know, you would need around 17-18 images for a 360x180 using the 10mm lens. You can see four examples in the WWP December event. Links are in the equipment list at timhatch.com/projects/wwp-equipment/data-1206.html . It seems to give good results.
John
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Alexis Hadjisoteriou
Posts: 8
Location: london, United Kingdom
Registered: 4 Dec 2006
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Re: Sigma 8mm vs Sigma 10-20
Posted: 16 Mar 2007 at 0:24 GMT
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Hi John,
17-18 images???? as many as that?
Oh well I'm hanging onto my 8mm!!
Great link - thanx for supplying.
See you soon
Alexis
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John Houghton
Posts: 2317
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Sigma 8mm vs Sigma 10-20
Posted: 16 Mar 2007 at 6:54 GMT
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Alexis Hadjisoteriou said: 17-18 images???? as many as that?
Alexis, There's a lens database at www.vrwave.com that will tell you how many images are needed for a 360x180 pano.
John
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Alexis Hadjisoteriou
Posts: 8
Location: london, United Kingdom
Registered: 4 Dec 2006
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Re: Sigma 8mm vs Sigma 10-20
Posted: 16 Mar 2007 at 11:20 GMT
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Useful link. Apparently you can get away with 14 shots for this lens but it is still way too laborious in comparison to my 8mm.
Thanx and regards
alexis
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eagle
Posts: 80
Location: Kona, Hawaii,
Registered: 16 Jan 2006
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Re: Sigma 8mm vs Sigma 10-20
Posted: 16 Mar 2007 at 14:01 GMT
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Hi alexis,
That's one of the reasons why I chose the Sigma 8mm over the Nikkor 10.5mm lens.
Less shots mean less time.
Thanks,
eagle
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etegration
Posts: 177
Location: Singapore
Registered: 28 Jan 2007
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Re: Sigma 8mm vs Sigma 10-20
Posted: 19 Mar 2007 at 1:42 GMT
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i am using a 10-20mm sigma on a 350D and i need as much as 26 pics, +30 degrees and -30 degrees each having 12 pics with interval of 30 degrees per shot + 1 x zenith and 1 x nadir to be able to properly stich them in PTGui. The zenith is giving quite some problem and seems like i may have to adjust the top degrees higher to have PTGui have more reference?
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Jean-Pierre Scherrer
Posts: 14
Location: Geneva, Switzerland, Switzerland
Registered: 23 Mar 2007
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Re: Sigma 8mm vs Sigma 10-20
Posted: 26 Mar 2007 at 6:53 GMT
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I just uploaded a 360x180 panorama (my first try) that i took with a Nikon D200 with the Sigma 10-20 and a Panosaurus head.
It's at www.panoguide.com/gallery/172/
I took 18 images: 8 at -30 deg. (every 45 degrees), 8 at + 30 deg., Nadir and Zenith.
I extensively use the Sigma for "normal" architecture shots, and i found it to be VERY sharp, even fully open !
Of course, an 8 mm. fisheye would simplify the job for making spherical panos, but i wouldn't use that lens for anything else, so.... finances first !
Cheers,
J-P.
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