Focus & Depth of Field — 7 Terms Defined

Scheimpflug Principle Focus & Depth of Field degrees The rule that when a lens is tilted, the subject plane, lens plane and image plane all intersect along a single common line. Subject, lens and image planes share one line

Selective Focus Focus & Depth of Field The deliberate use of a narrow zone of sharpness to direct attention to one element and suppress everything else.

Shallow Depth of Field Focus & Depth of Field m A narrow zone of sharpness that isolates the subject against a strongly blurred foreground and background.

Single-point AF Focus & Depth of Field An area mode in which the camera uses one selected focus point and ignores everything else in the frame.

Single-servo Autofocus Focus & Depth of Field An autofocus mode, marked AF-S or One Shot, that focuses once and then locks while the shutter button is held halfway.

Split-image Screen Focus & Depth of Field A focusing screen with a central circle divided in two, whose halves align only when the subject is in focus.

Subject Tracking Focus & Depth of Field A mode in which the camera identifies a chosen subject and follows it around the frame, moving the active focus area to match.