The spatial area in a shot that is in focus. The depth of field is influenced by the apertureThe aperture is basically a hole in the camera’s lens that lets light pass through it to the shutter and ultimately the film or censor. The aperture not only influences picture brightness but also regulates depth of focus. Most cameras are equipped with an iris aperture that can be freely adjusted or set according to pre-selected values. More size, the lens’ focal lengthThe optical distance in millimetres between a camera lens and the film (or sensor on a digital camera). It determines the height and width of the scene being captured, known as the field of view. More and the point of focus. Also called depth of focus.