External
Barn doors
Barn doors, or occasionally a set of barn doors, are an attachment fitted to the front of a Fresnel lantern, a type ofTop hat
A top hat, also known as a stove pipe or snoot, is a device used in theatrical lighting to shield the audience's eyes from the direct source of the light. It is shaped like aGel extender
Gel extenders are similar to top hats in appearance, being a tube placed over the end of a lighting fixture. Unlike top hats, however, gel extenders have a colour frame holder built into the end to allow color gel to be mounted. Gel extenders are also available in a conical shape which does not constrict the beam of light output from the fixture at all.Colour frame
A colour frame or ''gel frame'' is a piece of folded material, made from either metal or cardboard, designed to hold colour media (gel).Friedman, p. 180. Colour frames are placed directly outside the fixture, immediately in front of lens assembly. Most fixtures include an integrated holder for the frame. Some accessories designed to mount in the gel frame holder, such as Barn Doors, occasionally include an integrated replacement slot for frames. Comes in many different sizes for all types of lanterns including, profiles, fresnels, floods and par cansDoughnut
A doughnut, or donut, is a thin metal or cardboard panel, similar in shape and appearance to a colour frame, but with a small diameter hole intended to reduce off-axis rays of light being projected from a fixture. This increases sharpness of the light by reducing the effect of imperfect lenses. Doughnuts are designed to fit into the colour frame holder directly outside the fixture, immediately in front of lens assembly. Because they are typically thin, doughnuts can often be placed in the same slot as a gel frame. Doughnuts are typically used in fixtures in order to sharpen the beam when a template is in place.Color scroller
A color scroller, color changer, or "scroller" is a lighting accessory used to change color gels on stage lighting instruments without the need of a person to be in the vicinity of the light. It is attached in the gel frame holder on the outside of a lighting instrument, immediately in front of lens assembly. The "scroll" of colours inside the colour changer allows a single fixture to output several different colours, or no colour, and to rapidly change between colours on command. Most scrollers are controlled viaMoving mirror attachment
A moving mirror attachment is an ellipsoidal spotlight accessory that allows you to remotely re-position the beam of light, so that a single luminaire in a fixed position can be used for multiple "specials" in dozens of locations. Two of the most prominent models are the Elipscan by Meteor and the Rosco I-Cue.Other
;Beam Bender: A beam bender is essentially a large adjustable mirror, mounted into the color slot on the front of a lighting fixture. It is designed to allow a fixture to be mounted at right angles to the desired direction to be lit and have the output reflected (bent) accordingly. ;Drop in Boomerang: A Boomerang, also known as a Color magazine is a series of colored filters on hinges. A "Drop in Boomerang" is designed to mount into the color slot of a lighting fixture and provide the operator with several manually selected gels. Most often this accessory is seen in conjunction with the followspot yoke, when a fixture is being used as a small replacement followspot.Internal
Pattern holder
A pattern holder or gobo holder, is a metal frame designed to hold a gobo. Gobo holders are placed inside a fixture through a specifically designed opening, which places the pattern directly in the focal plane of the fixture. By placing the pattern inside of the focal plane of a fixture adjustments to image (hard or soft edges) can easily be created. Larger pattern holders are also available designed to mount into the accessory slot on some fixtures, allowing for the use of larger gobos, or the projection of two overlapping patterns from a single fixture.Gobo rotator
Gobo rotators are metal frames designed to hold a gobo. They have a much larger cross-section (thicker) than a regular gobo holder due to the motors and gearing required to facilitate rotation. Because of their increased thickness, gobo rotators are not placed inside fixture through the specifically designed opening (the gobo slot) but instead install into the accessory (iris) slot. Installing the rotator in the accessory slot still places the pattern inside the focal plane of a fixture, allowing adjustments to the image (creating hard or soft edges). All gobo rotators require an external power source, separate from the lighting fixtures power. Many models allow for remoteIris
The iris is a metal frame housing designed with an adjustable shutter assembly (an iris). The iris is placed inside fixtures through a specifically designed opening, the accessory (or iris) slot. The iris is placed inside focal plane of fixture, before the lens assembly. An iris is designed to reduce diameter of beam emitted from fixture. The iris assembly is different from the donut as it adjusts the diameter of the beam, not the amount of off-axis light emitted.Effects loop
Gam Products Inc. manufactures two different models of effect loop, the Film/FX and the SX4. Both of these devices use a ribbon punched with a pattern to project a continuous scrolling pattern. The Film/FX is designed to install into the accessory slot, while the SX4 is installed directly into the fixture, between the lamp assembly and barrel.Color changers
; Colormerge : High End System's manufactured the Colormerge as a color mixing unit made to be used with the ETC Source Four ellipsoidal fixture. Unlike a traditional color scroller, it is installed inside the unit between the lamp assembly and shutters. It provides CMY color mixing via dichroic glass plates, controlled thoroughExternal chassis
Followspot yoke
The followspot yoke is an oversized replacement yoke intended to allow an ellipsoidal reflector spot to be installed into a followspot stand and be used as a small, short throw followspot. Generally these yokes allow a much wider range of tilt than a conventional yoke, and have had the hole for a c-clamp bolt replaced with a spigot for a spot stand.City Theatrical AutoYoke
City Theatrical manufactures a complete assembly which essentially turns a conventional fixture into an automated fixture. The autoyoke is aApollo Design RightArm
The Right Arm adds pan and tilt capabilities to a wide range of static theatrical and studio lighting fixtures, allowing the designer to maximize the lighting rig without crowding fixtures or over-extending the budget. Video cameras and LCD projectors can be blended into the lighting rig with minimal preparation, providing easy adjustment from the lighting console. The Right Arm conveniently repositions these devices in theatrical and church productions, corporate events, trade shows - anywhere flexibility in the light plot is needed.See also
* Lens hood – still cameras * Matte box – video camerasReferences
Sources
* Friedman, Sally (1994). ''Backstage Handbook: an illustrated almanac of technical information'', Broadway Press * Shelley, Steven Louis (2009). ''A Practical Guide to Stage Lighting, Second Edition'', Focal Press {{Stagecraft Stage lighting instruments