Frankie Epifani
Posts: 4
Location: Phoenix, United States
Registered: 25 Jan 2010
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Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 31 Jul 2011 at 1:23 GMT
updated: 31 Jul 2011 at 1:45 GMT
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Hi everyone,
I'm having this great idea to pre-order this lens for my 5D MKII.. I keep reading up on it and can't seem to understand stand if/why the zoom part of this lens will in any way be beneficial when shooting pano's.
I'm stating to think that it might actually cause problems if there is a slight movement in zoom while shooting a pano.. I'm currently using the Sigma 8mm and I'm ready to move on from that lens. All your input is appreciated!
Frankie
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DennisS
Posts: 1292
Location: Los Anglels, United States
Registered: 1 Sep 2007
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Re: Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 31 Jul 2011 at 1:34 GMT
updated: 31 Jul 2011 at 1:35 GMT
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Frankie,
Why do you want to move away from your Sigma 8mm?
Dennis
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Frankie Epifani
Posts: 4
Location: Phoenix, United States
Registered: 25 Jan 2010
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Re: Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 31 Jul 2011 at 2:17 GMT
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Dennis,
The Sigma 8mm isn't a full frame lens and because of this there are a lot of wasted pixels in my work.. If I had the 7D then I feel the 8mm would be appropriate.
Frankie
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Jarredja
Posts: 83
Location: Keller, TX, United States
Registered: 26 Oct 2009
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Re: Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 31 Jul 2011 at 2:48 GMT
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Actually, as I understand it the 8mm is a full frame lens. You get the full circle 180 degree view only on a full frame. With the aps-c camera you are not getting the full 180 degree view. Granted you have black around the image with the fullframe but that is the intent according to Sigma's site.
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DennisS
Posts: 1292
Location: Los Anglels, United States
Registered: 1 Sep 2007
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Re: Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 31 Jul 2011 at 3:03 GMT
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On a Nikon asp-c camera, the Sigma 8mm produces a partial circular image. The sides are cropped but the top and bottom are still circular. I do not know what a Canon asp-c sensor does to the image.
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Juergen Schrader
Posts: 219
Location: Germany
Registered: 14 Jul 2006
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Re: Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 31 Jul 2011 at 4:21 GMT
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Frankie, many of is already use the Tokina 10-17 for the same reason and purpose. To prevent unwanted movement of the focal length ring we use a piece of tape to fix it.
Many are waiting to see if the Canon 8-15 will help to improve image quality, but as all sees are rather satisfied with the Tokina it will at least be a good and much cheaper alternative.
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Smooth
Posts: 3774
Location: Mount Panorama, Australia
Registered: 21 Jul 2004
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Re: Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 31 Jul 2011 at 9:09 GMT
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It is a long awaited lens, no doubt held up because of the tragedies in Japan.
I for one will be purchasing this lens. But you have to ask yourself what you want from it. At 8mm on your full size sensor Canon 5DMKII is will be just like the Sigma 8mm in image type. At 15mm just like the Canon or Sigma 15mm Fisheye. So the gain is "like having multiple" fisheyes in one. The question is do you want or need a 8, 10, 15mm in one? The advantage is lower or higher resolution panoramas based on the amount of shots required to cover the sphere. From as little as 3 to a maximum of 8 on the full size sensor body.
It is a Canon "L" series lens so optically should be superior to all fisheyes before it. But it comes at the expense of a slower aperture at f/4.0 vs f/3.5 for the Sigma 8mm and f/2.8 for the Canon 15mm fisheye.
The comparison with the Tokina 10-17 Zoom Fisheye (Shaved) is not a bad one. You are talking f/3.5 at 10mm and f/4.5 at 17mm. Where, 12mm-12.5mm is favoured by most using the lens. It is the compromise between shots required (4) and sharpest results from the lens. The Tokina is no comparision to the Canon f/2.8 15mm fisheye. Currently this lens is the premium lens for the Canon 5DMKII. It is sharp and well priced.
As for use on a Canon APS-C small sensor body all you need do is multiply the focal length by 1.6x making it approximately a 12.8mm to 24mm fisheye as apposed to 8-15mm on the full size sensor body.
Lens "creep" on a short "L" series lens is very unlikely but you could of course bump it.
Regards, Smooth 
www.omnipix.com.au
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 31 Jul 2011 at 14:26 GMT
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A good selection of images is available on LensTip.com at:
tinyurl.com/3z666p5
John
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Eric Herrmann
Posts: 6
Location: San Francisco, United States
Registered: 13 Jul 2010
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Re: Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 31 Jul 2011 at 18:56 GMT
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Frankie Epifani said: I'm stating to think that it might actually cause problems if there is a slight movement in zoom while shooting a pano..
From what I've read so far, the 8-15 supposedly has a zoom lock to prevent lens creep, so you shouldn't have any movement in the zoom while you're shooting. You may only be able to lock it at 8mm and 15mm (as opposed to anywhere along the zoom range). Although I doubt that that would be a problem since I think for panos you would probably be shooting either at 8 or 15 anyway.
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Frankie Epifani
Posts: 4
Location: Phoenix, United States
Registered: 25 Jan 2010
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Re: Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 31 Jul 2011 at 21:02 GMT
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Thanks for a the feedback guys.. I'm going to rent the lens first before I drop that amount of coin. If it's not a good fit I will just go with the Tokina 10-17mm and hope that my first attempt at shaving is a good one. Maybe I can get some local help from my friends at Nodal Ninja 
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Frankie Epifani
Posts: 4
Location: Phoenix, United States
Registered: 25 Jan 2010
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Re: Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 31 Jul 2011 at 21:03 GMT
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Eric,
I'm hoping there is a locking for the zoom.. If so, we are in business 
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Jorge
Posts: 1
Location: Madrid, Spain
Registered: 6 Aug 2011
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Canon EF 8-15mm f/4L Fisheye USM Fisheye Ultra-Wide Zoom
Posted: 6 Aug 2011 at 17:43 GMT
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Jorge said: More example photos. The CA is very high:
They spent 24 hours with the lens and took all 20 sample shots at F/4! How useful is that? The CA is no higher than for the other fisheyes we commonly use. It's easily corrected in RAW conversion so is of little concern. More interesting is how it performs as regards flare and glare. It seems to do rather well, but comparisons with other lenses taking the exact same shots are needed.
John
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Nick Fan
[NodalNinja]
Posts: 710
Location: Hong Kong
Registered: 26 May 2006
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