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
Amazon.com : Opteka 58MM 0.35x Fisheye Wide Angle Lens Compatible with Canon DSLR Cameras Including Macro Close Up Attachment : Camera Lenses : Electronics
NIKKOR 8MM FISHEYE
Opteka .35x High Definition II Super Wide Angle Panoramic Macro Fisheye Lens for Canon EOS 80D, 70D, 60D, 50D,1Ds, 7D, 6D, 5D, Rebel T7i, T6i, T5i, T7i, T6, T5i, SL1 and SL2
SPL-WA | 18mm Wide Angle Lens with Universal Clip Mount | Movo
0.17x Hi-Definition Super Fisheye Lens With Macro for Canon Powershot G15 G16 (58mm Lens, Adapter LA-DC58C not included) - Walmart.com
Amazon.com : 37MM 0.3X Fisheye Ultra Wide Angle Camcorder Video Studio Lens with Adapter : Electronics
Opteka 62mm 0.3x HD Ultra Fisheye Lens Adapter OPTSC62FE B&H
VLOGMAGIC 52mm/58mm/62mm/67mm/72mm 0.3X Ultra Wide Fisheye Lens Adapter with Lens Hood Only for Video Cameras Camcorders
4mm f/2.8 lens for E/FX/M43/EOS-M – Official 7Artisans Store