Century Fisheye Adapter, 65mm Clamp-on - Walmart.com
0.4x Fish Eye Adapter for 72mm Thread Lens
Amazon.com : Century Fisheye Adapter, 65mm Clamp-on : Camera Lens Adapters : Electronics
UNIVERSAL MK1 FISHEYE ADAPTER – VX FISHEYE SALES
Fisheye HD Adapter Sony HDV
UNIVERSAL MK1 FISHEYE ADAPTER – VX FISHEYE SALES
Olympus Fisheye Converter Lens Pack Fisheye lens and adapter ring for TG-4 and earlier Tough Series cameras at Crutchfield
Amazon.com : Opteka 58MM 0.35x Fisheye Wide Angle Lens Compatible with Canon DSLR Cameras Including Macro Close Up Attachment : Camera Lenses : Electronics
Sony VCL-ECF2 Fisheye Converter For SEL16F28 and SEL20F28
UNIVERSAL MK1 FISHEYE ADAPTER – VX FISHEYE SALES
Amazon.com : Opteka 0.35x HD2 Professional Super AF Fisheye Converter for Canon 18-55mm, 55-200mm, 28-90mm, 28-105mm, 70-300mm, 135mm Lenses : Camera Lens Adapters : Electronics