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15mm Full Frame Fisheye vs. 16-35mm at the wide end
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<blockquote data-quote="BackdoorArts" data-source="post: 210487" data-attributes="member: 9240"><p>After using my Rokinon 8mm this past weekend I'm longing for something like that for my D600 without losing all the MP's on a DX crop. It seems that the Sigma 15mm and the Nikon 16mm Fisheyes are my only option. Each claim "180 degree view on the diagonal", which I understand (bottom right to top left is a 180 degree angle of view), but what I haven't been able to ascertain is just how many degrees that is left to right. </p><p></p><p>Here's a link to an <a href="http://www.sigmaphoto.com/sites/default/files/angleofview_poster_new_0.jpg" target="_blank">angle of view comparison</a> on the Sigma site, and while it states that the 15mm fisheye has 180 degrees view, it looks an awful lot like the field of view from the 17mm lens directly underneath, which sports 103.7 degrees. So the real difference seems to be only the lines and distortion and not so much the L-to-R angle of view. If that's the case then the 107 degrees I get with my 16-35mm is actually wider, so I gain very little.</p><p></p><p>Does anyone here have any experience with the Sigma or Nikon FX Fisheyes? If so, what are your thoughts? I'd love to get something that produces photos closer to my Rokinon (which is equivalent to a 12mm), but if I have to I'll settle for using that with the D800 at 16MPs.</p></blockquote><p></p>
[QUOTE="BackdoorArts, post: 210487, member: 9240"] After using my Rokinon 8mm this past weekend I'm longing for something like that for my D600 without losing all the MP's on a DX crop. It seems that the Sigma 15mm and the Nikon 16mm Fisheyes are my only option. Each claim "180 degree view on the diagonal", which I understand (bottom right to top left is a 180 degree angle of view), but what I haven't been able to ascertain is just how many degrees that is left to right. Here's a link to an [URL="http://www.sigmaphoto.com/sites/default/files/angleofview_poster_new_0.jpg"]angle of view comparison[/URL] on the Sigma site, and while it states that the 15mm fisheye has 180 degrees view, it looks an awful lot like the field of view from the 17mm lens directly underneath, which sports 103.7 degrees. So the real difference seems to be only the lines and distortion and not so much the L-to-R angle of view. If that's the case then the 107 degrees I get with my 16-35mm is actually wider, so I gain very little. Does anyone here have any experience with the Sigma or Nikon FX Fisheyes? If so, what are your thoughts? I'd love to get something that produces photos closer to my Rokinon (which is equivalent to a 12mm), but if I have to I'll settle for using that with the D800 at 16MPs. [/QUOTE]
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Wide-Angle
15mm Full Frame Fisheye vs. 16-35mm at the wide end
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