Stagelighting accessories are components manufactured for conventional (non-automated) stagelightinginstruments. Most conventional fixtures are designed to accept a number of different accessories designed to assist in the modification of the output. These accessories are intended to either provide relatively common functionality not originally provided in a fixture (such as beam shaping through barn doors), or to extend the versatility of a lightinginstrument by introducing features. Other accessories have been designed to overcome limitations or difficulties some fixtures present in specific applications.
All stagelighting accessories fall into one of three distinct categories: components installed inside the fixture, components affixed to the front of the fixture (in front of the lens), or components mounted elsewhere on the exterior of a fixture (to the side, top or bottom).