Accessory used on lights to control the direction of output and the width of the beam.
A term used in television production to describe the effect that occurs when a 4:3 image is viewed o
A device with two sets of thin metal doors (horizontal and vertical) placed before a light source to control the direction of light.
Metal folding doors on all four sides of a lighting fixture. These can be moved on their hinges in order direct light for the shot.