1a. noun. A device with an adjustable circular aperture, used to reduce the size of the beam of an ERS
, or hard-edged moving light.
for a cool animation showing how irises work.
1b. verb. To open or close a followspot's iris on a cue
spot one to iris up to a head shot in five counts." "Spot two, iris out to include both performers when they come together."
2. A model of asymmetric
-reflector cyc light
, distributed under the brands Strand
. Comparable to the Colortran FarCyc
and Altman SkyCyc