Zone System

Methodology introduced by photographer Ansel Adams for determining optimal exposure and appropriate development for an individual photograph.

Zoom Flash

A flash with the capability to adjust the width of its light beam to best fit the angle of view of the lens in use.

Zoom Lens

A lens, which has a variable focal length -e.g. 70-200mm- allowing for a closer or farther view of a subject, without changing perspective, only magnification.