Flash synchronization is a method of synchronizing flash light duration with maximum shutter opening. There are usually two settings on a camera, X and M. X is the setting used for electronic flash. Flat is used to describe a negative or print with very low contrast. Flat-bed camera is a camera designed for copying artwork and documents. Mounted on a vertical column, like an enlarger, allowing the photographer to accommodate different documents or artwork for duplication.
Flat gradation is a subjective term used to describe low-contrast values.
Flat lighting is lighting that produces very little contrast or modeling on the subject and a minimum of shadows. Floating elements are one or more elements in a lens which adjust position relative to other components during focusing or zooming. Used to maintain correction of lens aberrations at all settings. Fluorescent whites are brilliant highlights produced by applying a fluorescent agent to a printing paper base. The print can also be treated after washing with a fluorescent whitener or dye solution.