This is the best demonstration of the difference between anamorphic cinematography and spherical cinematography I've ever seen. : r/cinematography
SIRUI 50mm f1.8 anamorphic Lens 1.33x - for various camera connections – SIRUI Optical GmbH
New Anamorphic Lens from Moment takes your film next level9to5Toys
Amazon.com: SmallRig 1.55XT Anamorphic Lens for iPhone and Android, Phone Cinematic Filmmaking Lens Phone Camera 2.76:1 Widescreen Ratio Imaging and Blue Flares Lens by Filmic Pro App-3578 : Cell Phones & Accessories