Focus & Depth of Field
4 terms
Parfocal Lens
Focus & Depth of Field
A zoom lens that holds focus on the same subject as the focal length is changed.
Phase-detection Autofocus
Focus & Depth of Field
A focusing method that splits incoming light into two views and measures their separation to determine both the amount and direction of defocus.
Plane of Focus
Focus & Depth of Field
m
The flat surface, parallel to the sensor, at which the subject is rendered with maximum sharpness.
Prefocusing
Focus & Depth of Field
m
Focusing in advance on the spot where the subject will be, then firing as it arrives.