click image to enlarge

    Donuts

    Share this page:

    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.


    Product Name A B C Part Number
    ColorSource Spot Jr. Donut 5.45" 5.45" 1.97" 2618
    S4, SL, SH, PC*  (3 3/16" center hole) 6 1/4” 6 1/4” 3 3/16” 2250
    S4, SL, SH, PC* (2 1/2" center hole) ** 6 1/4” 6 1/4” 2 1/2" 2260
    6” Ellipsoidal, S4 Zoom 7 1/2” 7 1/2” 3” 2200
    S4 10°, SL 10° 12” 12” 6” 2252
    S4 5° 14” 14” 7” 2251
    SL 5° 16” 16” 7” 2258
    S4 Mini  2.76" 2.76"  2.3" 2575 
    S4 Mini White  2.76"   2.76"  2.3"  2575W 
    125mm  125mm 125mm 81mm 2208
    185mm  185mm 185mm 81mm 2210

    *Source Four, Strand SL, Shakespeare, Pacific (19-50°)

    **Smaller aperture provides shaper image but less brightness. 

    Features


    • Used to help bring templates into perfect sharpness
    • Durable black powdercoat finish
    • Fabricated from light gauge steel

    Specifications

    Videos

    Images

    2250_Donut_3_316_Center_Hole_6_14_S4_SL_SH_PC_Black_MED




    Downloads

    Types

    Case Studies