Diagonal Fisheye : Canon 15mm vs Sigma 15mm

Started Apr 13, 2008 | Discussions thread
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Diagonal Fisheye : Canon 15mm vs Sigma 15mm
Apr 13, 2008

Ok, I can't decide. I am going to buy one of these this week.

Both are diagonal 180°, both are 15mm, and both are f/2.8
I will assume that the MFD is similar if not the same for both.

One is an older design, costs £100 more, and has a 1 year warranty, the other has a 5 year warranty (I think)

Is there a known difference in performance or IQ that would make me choose the Canon over the Sigma?

This will be mounted on a 5D

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