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S
SHUTTER
A metal plate or cutter placed at the gate of an ERS (or less commonly within an automated fixture or followspot) that allows a portion of the beam to be cut away or eliminated.
SHUTTER CUT
The resulting effect of positioning a shutter within an ERS. Shutter cuts are often made to eliminate unwanted parts of the field of light which may hit scenery or into the audience.
SIDE LIGHT
- Light which comes primarily from the side of the actor or object being lit. Strong side lighting is associated with the emphasis of the edges or sides of actors or objects tending to enhance their dimensionally.
- Lights projecting from the side of a performance space to enhance the dimension of lighted objects.
SIGHTS
A pair of metal rings attached to the side or top of a followspot which enables the operator to accurately line up the beam (by looking down the length of the followspot through the rings) before turning it on.
SILHOUETTE
- To light the cyclorama or a piece of upstage set in such a way that the actors are cast into shadow. Can be a very dramatic effect.
- A range of 2000W lanterns manufactured by CCT in the UK.
SILK
A special type of diffusion frost filter which stretches the light in one direction. Especially useful for lighting large cycloramas with a limited number of lanterns, or for lighting an elongated object (eg a staircase) with one lantern.
SIRIUS
Manual/memory lighting control desk previously manufactured by Zero 88 in the UK. Available as Sirius 24 (24 channels) or Sirius 48. Desks can be linked together.
SIX LAMP BAR
An internally-wired lighting bar, designed for touring, with six socket outlets terminated in a multi-way connector (e.g. SOCAPEX or LECTRIFLEX). Often pre-rigged with lanterns (eg Parcans). Stored in Meatracks. A bar pre-rigged with Parcans is sometimes known as a PAR BAR.
SMOKE DETECTORS
Many theater buildings have complex fire alarm systems installed. Some theater spaces have smoke detectors in them, which trigger a fire alarm when the space fills with smoke. The use of SMOKE MACHINES in these spaces can (and does) result in expensive call-outs of the fire department and evacuated auditoria. There are special heat-sensitive detectors called RATE OF RISE detectors which trigger a fire alarm when the temperature rises faster than it should normally. Properly calibrated (and regularly tested) these can be as
effective than the smoke detectors (which work by "seeing" smoke articles in the air). If it's not possible to get Rate of Rise detectors installed in your theater space instead of smoke detectors, you may be able (subject to local building regulations and local fire department advice) to isolate the smoke detectors for the duration of the performance when you use smoke effects. Properly designed alarm systems incorporate timed isolation, so
that smoke detectors are only off for a specific period, and automatically come on after that period.
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