Donut
Part Number(s) 2618, 2250, 2260, 2200, 2201, 2202, 2218, 2252, 2251, 2258, 2259, 2575, 2208, 2210 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.
| Part Number | | Product Name | | A | | B | | C |
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| 2618 | | ColorSource Spot Jr. Donut | | 5.45" | | 5.45" | | 1.97" |
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| 2250 | | S4, SL, SH, PC* (3 3/16" center hole) | | 6 1/4” | | 6 1/4” | | 3 3/16” |
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| 2260 | | S4, SL, SH, PC* (2 1/2" center hole) ** | | 6 1/4” | | 6 1/4” | | 2 1/2" |
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| 2200 | | 6” Ellipsoidal, S4 Zoom | | 7 1/2” | | 7 1/2” | | 3” |
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| 2201 | | New! 7.5" with 2.5" Aperture | | 7 1/2” | | 7 1/2” | | 2 1/2” |
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| 2202 | | New! 7.5" with 3.5" Aperture | | 7 1/2” | | 7 1/2” | | 3 1/2” |
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| 2218 | | New! 10" Donut | | 10” | | 10” | | 4” |
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| 2252 | | S4 10°, SL 10° | | 12” | | 12” | | 6” |
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| 2251 | | S4 5° | | 14” | | 14” | | 7” |
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| 2258 | | SL 5° | | 16” | | 16” | | 7” |
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| 2259 | | 17.5" Donut | | 17 1/2” | | 17 1/2" | | 10” |
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| 2575 | | S4 Mini | | 2.76" | | 2.76" | | 2.3" |
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| 2208 | | 125mm | | 125mm | | 125mm | | 81mm |
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| 2210 | | 185mm | | 185mm | | 185mm | | 81mm |
*Source Four, Strand SL, Shakespeare, Pacific (19-50°)
**Smaller aperture provides shaper image but less brightness.