Due to the optical properties of photographic lenses, only objects within an exact extensity of distances from the camera will be reproduced clearly. The modus operandi of adjusting this domain is known as changing the camera's focus. There are multitudinal ways of focusing a camera accurately. The simplest cameras have fixed focus and use a inconsequential aperture and wide-angle lens to ensure that everything within a assertive distance of extent from the lens, usually around 3 metres (10 ft) to infinity, is in reasonable focus.
Fixed focus cameras are usually inexpensive types, such as single-use cameras. The camera can also have a narrow focusing range or scale-focus that is indicated on the camera body. The user will guess or Camera Bags calculate the compass to the subject and adjust the focus accordingly. On some cameras this is indicated by symbols (head-and-shoulders; two people repeated upright; precise tree; mountains).
