ETC Source Four Donut

Key Features

  • Used to help bring templates into perfect sharpness








Donuts are used in the colour 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 trade off that designers are willing to make.

Additional information


75mm, 63mm, 190mm