Image capturing

A camera assembly (6) for mounting on a vehicle (2) (e.g. an aircraft), the camera assembly (6) comprising: a fixture (e.g. a rotatable drum (18)); a camera (14); and a mirror (16); wherein the fixture is arranged to be rotated relative to the vehicle (2) about an axis (24); the camera (14) is mounted on the fixture such that the camera (14) has a substantially fixed position relative to the fixture; the mirror (16) is mounted on the fixture such that, if the fixture rotates, the mirror (16) rotates; the mirror (16) is rotatable relative to the fixture about a further axis (26), the further axis (26) being substantially perpendicular to the axis (24); and the camera (14) is arranged to detect electromagnetic radiation reflected by the mirror (16). The axis (24) and the further axis (26) may intersect.