Product details:

The Opteka 58mm 0.3X HD Ultra Fisheye Lens Adapter uses multi-coated low-dispersion glass to produce crisp high-definition video images. Great for dramatic effects and extremely wide fields of view--think sports think dream sequences think the HAL-9000 computer--this fisheye adapter screws onto the front of your existing camcorder lens and bends a 180 view into a peephole-style circle. Straight lines become curved noses become bulbous eyes become goggly and objects in your viewfinder will be closer than they appear.