Century Precision Optics 0HD-FEAD-AG 0.45x Fisheye 0HD-FEAD-AG
Opteka 37mm 0.3X High Definition II Ultra Fisheye Lens for 25mm, 30mm,
0.7x Wide Angle Adapter for 77mm Thread Lens
Opteka 72mm 0.3x HD Ultra Fisheye Lens Adapter OPTSC72FE B&H
Amazon.com : Opteka 58MM 0.35x Fisheye Wide Angle Lens Compatible with Canon DSLR Cameras Including Macro Close Up Attachment : Camera Lenses : Electronics