Fisheye HD Adapter Sony Bayonet Mount
When you're shooting for a truly exaggerated point of view, twist on the Century Fisheye Adapter. The Fisheye gets you a wide view, with a non-vignetting fisheye look.
The fisheye exaggerates depth, pulling nearby objects closer, and causing distant objects to recede into the background. A fixed adapter, the Fisheye doesn't allow for zooming - but you'll want to stay at the wide end of the range anyway, for the most pronounced effect.