Century Optics Fisheye Auxiliary Lens for Sony HDR-FX7 & HVR-V1U HDV Camcorders With Bayonet Mount -
When you're shooting for a truly exaggerated point of view, twist on the Century Fisheye Adapter. The fisheye exaggerates depth, pulling nearby objects closer, and causing distant objects to recede into the background.
The Fisheye gets you a wide view, with a non-vignetting fisheye look. 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.