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K (Kelvin)

Thermodynamic temperature scale measurement used to describe the color content of continuous spectrum light sources.

Key Light

It is studio light used to control the tonal level of the main area of the subject.

Keystoning

Distortion of a projected image when the projector is not directed perpendicular to the screen. Also applied to the convergence of vertical lines in tall buildings when not photographed with a Perspective Control lens.

Kilobyte

A data file size that comprises 1024 bytes.

Kilowatt

One thousand watts. Used to measure the power of an electrical light source.