A camera (2) swivels on an observation telescope (1) between a shooting position in which the optical axis (6) of the camera objective (8) extends in the direction of the optical axis (7) of the telescope eyepiece (5) and an observation position in which the target is observable through the telescope eyepiece (5), by being fastened to a swivel arm (3) linked to the observation telescope (1) whereby the optical axes (6, 7) of the camera objective (8) and the telescope eyepiece (5) form an angle (.alpha.) in the observation position.