Originally submitted at Adorama
Sigma 8mm f/3.5 EX DG Circular Fisheye Auto Focus Lens for Canon EOS Cameras
Excellent build quality, depth of field
Pros: Easily Mounted, Long warranty period, Strong Construction, Excellent depth of field, Easily Accessible Controls
Cons: Long auto focus time, Heavy
Describe Yourself: Getting started, Professional
Best Uses: Unique point of view, Vr photography
Bottom Line: Yes, I would recommend this to a friend
My primary use for the lense is cutting down on the number of photos for the VR's that I make for clients. It certainly does it's job but of course reduces total resolution of my final stitched image. It would not be suitable for my higher end VR work, at least not without a very high megapixel camera.
I was very surprised at the incredible depth of field, and that immediately motivated me to get creative with it in my still photography. It has excellent construction, and mine came with an incredible 4-year warranty.
A few notes on the negative side, it does seem to cause my camera's meter to give underexposed readings, and there does seem to be more chromatic aberration than i would like around the periphery of the images.
All in all though, I'm very happy with it.
(legalese)