Stores conveniently in the included carabiner hard case carrier when not in use. Designed to bring more of the scene into each image, the red 18mm Wide-Angle Lens from Sirui allows your mobile device to capture images with a focal length that is equal to 18mm in full-frame, which allows users to capture more of their environment in their photos. This is especially useful for landscapes, architecture, and interior photography, as well as confined spaces and environments where the photographer may not be able to move further away from a subject when shooting it. This lens also features a 95° diagonal viewing angle and is built using 6 elements in 6 groups with an optical distortion of less than 2%. To help ensure high-quality images, this lens uses Schott optical glass, and its scientific-grade aluminum housing helps provide reliability and durability. Attach this lens to your mobile device using the included lens clip adapter.