Roger Hein
Posts: 40
Location: North York, Canada
Registered: 27 Sep 2006
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Advice on using Sigma 8mm and Nikon 'FX' body
Posted: 29 Jul 2008 at 20:45 GMT
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I've been quite happily doing 360vrs with my cropped sensor Nikons using a Nikkor 10.5mm and lately a Sigma 8mm/3.5 lenses.
However I just bought a FF Nikon D700 and did a couple of tests this past weekend with the Sigma 8mm/3.5 lens.
For this test I shot 3 around at -5 deg pitch plus a zenith. Lens was set at a distance marking of 1m and used at f/11. No additional adjustments were done on the files.
www3.sympatico.ca/rogein/publicdownload/pano_test...
What I'm wondering is how I can improve the 'edge' quality? There's a lot more 'smearing' towards the edge field of view than I'm use to with my previous setups.
I realize that ideally I should probably be shooting with something like a 15mm or 16mm fisheye for better resolution on a FF sensor. But I've seen some 360vrs shot on a Canon 5D using the Sigma 8mm and there's none of the image smear I'm experiencing.
Any suggestions would be appreciated.
Thanks!
Roger...
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Re: Advice on using Sigma 8mm and Nikon 'FX' body
Posted: 29 Jul 2008 at 20:53 GMT
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The resolution you get with the Sigma 8mm on a fullframe sensor is much smaller.
Thats the only reason for the worse edge quality.
You could shave your 10,5mm and get a little better resolution.
Hans
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Bradford Bohonus
Posts: 224
Location: United States
Registered: 29 Jan 2008
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Re: Advice on using Sigma 8mm and Nikon 'FX' body
Posted: 29 Jul 2008 at 21:57 GMT
updated: 29 Jul 2008 at 21:58 GMT
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Have you considered using the Nikon 16mm fullframe fisheye on the FX D700 as a comparable replacement to the 10.5 on a DX sized sensor?
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Roger Hein
Posts: 40
Location: North York, Canada
Registered: 27 Sep 2006
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Re: Advice on using Sigma 8mm and Nikon 'FX' body
Posted: 29 Jul 2008 at 23:57 GMT
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Hans,
That's what I suspected but thought I would ask those with more experience.
Thanks,
Roger...
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Roger Hein
Posts: 40
Location: North York, Canada
Registered: 27 Sep 2006
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Re: Advice on using Sigma 8mm and Nikon 'FX' body
Posted: 30 Jul 2008 at 0:01 GMT
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di19026 said: Have you considered using the Nikon 16mm fullframe fisheye on the FX D700 as a comparable replacement to the 10.5 on a DX sized sensor?
Yes I have - along with the Sigma 15mm. Both seem to get positive comments from users. The Nikkor is about 20% more than the Sigma locally.
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Bradford Bohonus
Posts: 224
Location: United States
Registered: 29 Jan 2008
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Re: Advice on using Sigma 8mm and Nikon 'FX' body
Posted: 30 Jul 2008 at 2:06 GMT
updated: 30 Jul 2008 at 2:13 GMT
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Roger Hein said: Yes I have - along with the Sigma 15mm. Both seem to get positive comments from users. The Nikkor is about 20% more than the Sigma locally.
Being that the Nikon 16mm utilizes all metal construction, this could certainly account for a part of that price difference? Is any plastic used in the Sigma?
Additionally, a photographer met with me recently that uses a shaved Tokina 10-17 on his full-frame camera (in this case a Canon). This is a very interesting option, as you can get the following range of results from using different zoom settings-
- a full circle fisheye image (widest setting)
- a fisheye circle that extends to the top but with the sides cropped (middle zoom setting)
- a full-frame fisheye image (full zoomed setting)
I can think of occasions where it would have been nice to be able to pick from one of these for any particular shot.
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Roger Hein
Posts: 40
Location: North York, Canada
Registered: 27 Sep 2006
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Re: Advice on using Sigma 8mm and Nikon 'FX' body
Posted: 30 Jul 2008 at 10:46 GMT
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di19026 said: Roger Hein said: Yes I have - along with the Sigma 15mm. Both seem to get positive comments from users. The Nikkor is about 20% more than the Sigma locally.
Being that the Nikon 16mm utilizes all metal construction, this could certainly account for a part of that price difference? Is any plastic used in the Sigma?
Additionally, a photographer met with me recently that uses a shaved Tokina 10-17 on his full-frame camera (in this case a Canon). This is a very interesting option, as you can get the following range of results from using different zoom settings-
- a full circle fisheye image (widest setting)
- a fisheye circle that extends to the top but with the sides cropped (middle zoom setting)
- a full-frame fisheye image (full zoomed setting)
I can think of occasions where it would have been nice to be able to pick from one of these for any particular shot.
I'm sure there are plastics used in the Sigma lenses though I admit, on my 8mm, it's never been a concern. Ideally would prefer the Nikkor but having just blown the bank on the D700 I'm a bit tapped out.
The Tokina intrigues me and have found it locally for a decent price BUT after seeing the jpegs of the 'operation' I'm really leery of doing it.
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iam360Texas
Posts: 298
Location: Fort Worth, Texas, United States
Registered: 12 Jul 2006
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Re: Advice on using Sigma 8mm and Nikon 'FX' body
Posted: 30 Jul 2008 at 17:02 GMT
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A friend of mine in the UK used a Canon 350d and a Tokina fisheye lens. You will see is a series of thumbnail images.. scroll through the lot and click on one thumbnail that might interest you.
I really think Rodrigo is doing a good job.
www.alarcon.pwp.blueyonder.co.uk/pictureFlow29/pi...
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