Reviews and Problems with Canon EF 15mm f/2.8 Fisheye
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1 May 2007
Excerpt: I got hold of this lens because I wanted to do some technical photography. We needed to show the view of a radar sensor that "sees" in a hemisphere and hence wanted a lens with a 180 degree angle of view. The Canon EOS 15 fisheye has an advertised 180 degree angle of view but it turns out to be corner-to-corner along the diagonal. It isn't nearly as wide as a true hemispherical view.