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Lenses
Wide-Angle
15mm Full Frame Fisheye vs. 16-35mm at the wide end
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<blockquote data-quote="Steve B" data-source="post: 210506" data-attributes="member: 15754"><p>With ultra wide angle lenses there are three different types. Rectilinear (most wide angle zooms fall into this category), full frame fisheye (diagonal FOV of 180), circular fisheye (180 FOV in all directions but circular image). Just google "rectilinear vs fisheye lenses" and you will find a lot of info. On the Sigma AOV comparison it looks like the 15mm is a full frame fisheye and the 17mm is a rectilinear lens. I've had experience with full frame fisheye lenses on 4/3 cameras (Olympus 8mm) but not on DX or FX yet.</p><p>Sigma makes a circular fisheye for FX: <a href="http://www.bhphotovideo.com/c/product/440661-REG/Sigma_485306_8mm_f_3_5_EX_DG.html" target="_blank">http://www.bhphotovideo.com/c/product/440661-REG/Sigma_485306_8mm_f_3_5_EX_DG.html</a></p></blockquote><p></p>
[QUOTE="Steve B, post: 210506, member: 15754"] With ultra wide angle lenses there are three different types. Rectilinear (most wide angle zooms fall into this category), full frame fisheye (diagonal FOV of 180), circular fisheye (180 FOV in all directions but circular image). Just google "rectilinear vs fisheye lenses" and you will find a lot of info. On the Sigma AOV comparison it looks like the 15mm is a full frame fisheye and the 17mm is a rectilinear lens. I've had experience with full frame fisheye lenses on 4/3 cameras (Olympus 8mm) but not on DX or FX yet. Sigma makes a circular fisheye for FX: [URL]http://www.bhphotovideo.com/c/product/440661-REG/Sigma_485306_8mm_f_3_5_EX_DG.html[/URL] [/QUOTE]
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Lenses
Wide-Angle
15mm Full Frame Fisheye vs. 16-35mm at the wide end
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