City Theatrical Donut

City Theatrical Donut City Theatrical 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 [caption id="attachment_151594" align="alignnone" width="300"] 2250 Donuts Specs Med[/caption]

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
New! 7.5" with 2.5" Aperture	7 1/2”	7 1/2”	2 1/2”	2201
New! 7.5" with 3.5" Aperture	7 1/2”	7 1/2”	3 1/2”	2202
New! 10" Donut	10”	10”	4”	2218
S4 10°, SL 10°	12”	12”	6”	2252
S4 5°	14”	14”	7”	2251
SL 5°	16”	16”	7”	2258
New! 17.5" Donut	17 1/2”	17 1/2"	10”	2259
S4 Mini	2.76"	2.76"	2.3"	2575
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