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 deception jamming angles. This pattern is typically represented by measuring the angle where it has one-half the sensitivity as it does on the boresight. This is known as the half power point. This means that a target in a radar beam will return a signal when the antenna is anywhere within a few degrees of the boresight. The pattern is too wide to allow the radar to directly guide weapons, especially anti-aircraft artillery which need accuracy on the order of 0.1 degrees. However, it is possible to use the non-linear pattern to improve the angle measurement using a system known as conical