Donuts are used in the color frame slot of an ellipsoidal reflector spotlight to sharpen gobo projections. Similar to the way the human eye sharpens focus when it squints, a donut reduces the aperture and sharpens the output of the fixture. There is some reduction in brightness to achieve this increase in sharpness but this is often a tradeoff that designers are willing to make.
Specifications: 14" square fits 5 degree Source Four S4 ■ Aperture size: id 7" ■ Size: 14"x14"x0.125" ■ Color: Black 7#9632; Material: Steel
Country Of Origin: United States
Unspsc: 39112304
U.S.Tariff#: 9405.40.8000
Warranty: 1 Year Limited
Color: Black