Amazon.com : Universal 17MM to 52MM Phone Camera Lens Filter Adapter Smartphone Ring Video Rig Lens Adapter for 52mm Cpl Variable ND polarizing Filters Set Step up Rings for iPhone Android Phones :
Anamorphic Lens Clamps — Vid-Atlantic Media Productions
Anamorphic, Anamorfake, Anamorfaux — Vid-Atlantic Media Productions
Ulanzi 52mm Filter Adapter Fit For Anamorphic Lens 1.33x Fit For Moment Lens - Buy 52mm Filter Adapter Product on Alibaba.com
52mm Filter Mount - for Anamorphic Lenses - Moondog Labs
The Marketplace for Photographers and Filmmakers - Moment
52mm clamp to M67x0.75 male thread adapter for Kowa Anamorphic 16-H lens 763461175532 | eBay
Ulanzi 52mm Filter Adapter Fit For Anamorphic Lens 1.33x Fit For Moment Lens - Buy 52mm Filter Adapter Product on Alibaba.com