As its name says, the Lomo Fisheye camera has a fish-eye lens. Lomo FishEye was the first 35mm compact camera to offer such a wide angle (170°), and has been producing very good results. FishEye Lomo is an OS X app that replicates this effect on all your photos and offers many, many controls.
v1.1 [May 9, 2012]
Add the ability to have conventional fisheye and circular fisheye effect.
