Canon 50mm f/0.75 XI Lens Review on the Sony (Stephen M. Blythe). – sonyalpharumors
Beastgrip x Kenko Pro Series 0.75x Wide-Angle BGL104-WA B&H
50 mm f/0.75 - The fastest photographic lens in the world! by ExperimentalOptics — Kickstarter
Amazon.com: Beastgrip x Kenko 0.75X Wide Angle Lens - Pro Series - for iPhone, Pixel, Samsung Galaxy, OnePlus and Other Android Phones : Cell Phones & Accessories