Angle of view camera–subject distance to preserve the size of a subject, changing the angle of view can indirectly distort perspective, changing the apparent relative size of the subject and foreground. If the subject image size remains the same, then at any given aperture all lenses, wide angle and long lenses, will give the same depth of field. An example of how lens choice affects angle of view. This table shows the diagonal, horizontal, and vertical angles of view, in degrees, for lenses producing rectilinear images, when used with 36 mm × 24 mm format (that is, 135 film or full-frame 35mm digital
Angle "AOC", then The measure of the angle "AOC" is the sum of the measure of angle AOB and the measure of angle "BOC". In this postulate it does not matter in which unit the angle is measured as long as each angle is measured in the same unit. Units used to represent angles are listed below in descending magnitude order. Of these units, the "degree" and the "radian" are by far the most commonly used. Angles expressed in radians are dimensionless for the purposes of dimensional analysis. Most units of angular measurement are defined such that one "turn" (i.e. one