Letus launch Anamorphic adapter for GoPro Hero3+ - Newsshooter
A GoPro anamorphic lens adaptor for $199!
52mm Filter Mount - for Anamorphic Lenses - Moondog Labs
Kase Anamorphic Widescreen Film Attahcment Lens for GoPro HERO 9 Black Action Camera| | - AliExpress
1.55X Movie Lens for Gopro hero 9 Sports Camera HD Anamorphic Lens Wide Screen Video Widescreen Slr Lens Filter Accessories|Sports Camcorder Cases| - AliExpress
1.55X Widescreen Lens Optical Glass Small Portable Anamorphic Lens for Hero 9 Camera Accessories|Sports Camcorder Cases| - AliExpress