Focus & Depth of Field
16 terms
Face Detection
A system that identifies human faces in the frame and prioritises them for focus and often for exposure.
Focus & Depth of FieldFocus
The condition in which light from a point on the subject converges to a point on the sensor, rendering that part of the scene sharp.
Focus & Depth of FieldFocus and Recompose
The technique of focusing with a central point, locking, then shifting the camera to place the subject elsewhere in the frame.
Focus & Depth of FieldFocus Bracketing
An in-camera function that automatically shoots a sequence of frames at incrementally different focus distances.
Focus & Depth of FieldFocus Breathing
A change in a lens's angle of view as it is focused, so the framing appears to zoom slightly during a focus pull.
Focus & Depth of FieldFocus Confirmation
An indicator, usually a dot or the illumination of an AF point, showing that the camera considers focus achieved.
Focus & Depth of FieldFocus Limiter
A switch that restricts a lens's focusing range, so autofocus does not search through distances the subject cannot occupy.
Focus & Depth of FieldFocus Lock
Holding the current focus distance so that further movement of the camera or subject does not trigger refocusing.
Focus & Depth of FieldFocus Magnification
A function that enlarges part of the live image so focus can be judged at a pixel level.
Focus & Depth of FieldFocus Peaking
A display aid that outlines the highest-contrast edges in the live image, marking what is currently in focus.
Focus & Depth of FieldFocus Priority
A setting that prevents the shutter from firing until the camera confirms focus has been achieved.
Focus & Depth of FieldFocus Shift
A movement of the plane of sharpest focus as a lens is stopped down, caused by residual spherical aberration.
Focus & Depth of FieldFocus Stacking
Combining several frames focused at different distances into one image with depth of field no single exposure could achieve.
Focus & Depth of FieldFocus Throw
The angle through which a focus ring must turn to travel from minimum distance to infinity.
Focus & Depth of FieldFocus-by-wire
A manual focus ring that sends an electronic signal to a motor rather than moving the optics mechanically.
Focus & Depth of FieldFront Focus
A calibration error in which a lens consistently focuses slightly nearer than the intended subject.