Opteka 67mm 0.3x HD Ultra Fisheye Lens Adapter OPTSC67FE 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
Opteka 58mm 0.3x HD Ultra Fisheye Lens Adapter OPTSC58FE B&H
Century Precision Optics 0.55x Fisheye Adapter Lens 0HD-FESU-HVX
Amazon.com : Opteka 0.20X Professional AF Fisheye Lens for Canon EF EOS 80D, 77D, 70D, 60D, 50D, 40D, 7D, 6D, 5D, 5Ds, 1Ds, Rebel T7i, T7s, T6s, T6i, T5i, T5, T4i, T3i,
Amazon.com: Movo SPL-FE 238° Super Fisheye Lens with Universal Clip Mount for Smartphones - Fisheye Lens for iPhone, Android, and Tablets - Clip on Camera Lens Kit with Photo Lenses for Cell
Arducam M12 Lens Kit for Raspberry Pi High Quality IMX477 Camera, Fisheye Wide Angle Telephoto M12
0.17x Hi-Definition Super Fisheye Lens With Macro for Canon Powershot G15 G16 (58mm Lens, Adapter LA-DC58C not included) - Walmart.com
Arducam 180 Degree Fisheye 1/2.3" M12 Lens with Lens Adapter for Raspberry Pi High Quality