Good for cropped Canons

I wasn't sure about this lens when I couldn't find conclusive reviews or samples for this lens, but I'm glad that I took a chance. It's sharp and slightly wider than the Tokina 10-17mm (did a side by side with a friend's Tokina).

Consistent Output; Durable; Easily Interchangeable; Easy To Clean; Rugged; Sharp Focus; Strong Construction

CA in high contrast

Sigma's Fisheye Duo; The Sigma 4.5mm f/2.8 EX DC HSM & 10mm f/2.8 EX DC HSM (Motor-In) Lenses

If you ever want a unique point of view try a "fisheye" lens. Like looking through a door peephole (which in fact is a "fisheye" type) this order of lens sacrifices linear correction in favor of a very wide angle of view.