Used to increase the clarity of patterns and custom gobos by reducing halation thus sharpening the image. They sharpen the definition of projected images by blocking the unwanted light. Stagespot recommends using a donut on all your gobo projections.

Please Note: The ETC Source 4 Fixed Degree Fixture uses a 6.25" donut. The ETC Source 4 Zoom uses a 7.50" donut.