Aviation photography is the act of capturing images of aircraft, either in flight, or on the ground. Like other specialties in photography, aviation photography requires knowledge of special techniques and of the aircraft to be done properly. There are different types of aviation photography, including air-to-air, ground-to-air, ground-static, and remote photography. Military aviation photography, especially air to air, requires additional skills, as the photo and target aircraft often fly at velocities from 500 to 1000 knots, while under moderate to high G. In ground-static photography, photos of stationary aircraft are taken by photographers on the ground. This type of photography gives the most flexibility and freedom in terms of composing one's shot. Photos can be of aircraft exteriors, interiors, and aircraft details. The photographer has full control over lighting, aircraft placement, camera angles, and background. Involving other subjects such as the pilot or other aircraft is much easier to accomplish in ground-static photography than in other forms of aerial photography.