Action Camera
A small, ruggedised, wide-angle camera built to be mounted on a body, vehicle or piece of equipment.
In depth
Everything about the design follows from where it is mounted: an ultra-wide lens so the subject stays in frame without aiming, deep depth of field so nothing needs focusing, aggressive electronic stabilisation, and a waterproof shell. Image quality is limited by a small sensor, but the point is access to viewpoints no conventional camera can occupy.
Examples in practice
A helmet-mounted action camera records a mountain-bike descent from the rider's eyeline, hands free throughout.