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 :
Ulanzi 1.55XT Mobile Phone Anamorphic Movie Lens 2.8:1 Wide Frame 17mm Lens Interface with Universal Phone Clips 52mm Filter Adapter Ring Carry Bag Replacement for 12/11/10/9 - Walmart.com
52mm clamp to M67x0.75 male thread adapter for Kowa Anamorphic 16-H lens 763461175532 | eBay