7Artisans, a Chinese maker of decent, cheap, non-autofocus lenses, will launch a 10mm f/2.8 fisheye for Canon, Nikon, Sony and L mounts. Its design is simple, but the provided MTF chart – via Sony Addict – suggests it is fairly sharp for an ultra wide angle lens, with unusually low astigmatism. Especially in the inner 2/3rds of the frame from the center, it performs decently.