Depth of field is the distance between the nearest and farthest objects in a scene that appear clear and sharp in an image. A lens can precisely focus at only one distance at a time, despite this, the decrease is gradual on each side of the focused distance so that within the depth of field the unclear and unsharp areas are imperceptible under normal viewing conditions.
Depth of field is affected by three factors; the aperture (smaller apertures give greater depth of field), the focal length of the lens (shorter focal lengths give greater depth of field) and the distance from the camera to the subject focussed on (the greater the distance the greater the depth of field).
Depth of field is affected by three factors; the aperture (smaller apertures give greater depth of field), the focal length of the lens (shorter focal lengths give greater depth of field) and the distance from the camera to the subject focussed on (the greater the distance the greater the depth of field).
Shallow Depth of field Photos:
Great Depth of Field Photos: