Another good lens is the Rokinon 8mm F3.5 priced at $279 on Amazon and B&H. I saw some good reviews about this lens - here is one, and some sample photos too, although this review is for the Nikon mount.

Another good lens is the Rokinon 8mm F3.5 priced at $279 on Amazon and B&H. I saw good reviews about this lens on both sites.

Here is a review of the lens from thephoblographer.com, and some sample photos too, although this review is for the Nikon mount.