1. Lighting. Inserted in the colorframe
holder, an accessory for an ERS
that looks like a single-sided colorframe with a hole in the center ranging from 1" to 4". Used to sharpen a gobo
image due to inaccuracies in reflector
design. The smaller the hole the sharper the image, but at a loss of intensity
. Usually one wants the largest hole that will achieve the sharpness desired. Donuts compensate for the fact that no lamp filament is an actual point
source, thus negating slightly the ideal geometry of the ellipsoidal
Available commercially, but also can be fabricated out of anything non-flammable that will withstand the heat at the lens
of a unit
. An easy DIY is to place a piece of BlackWrap
™ in a colorframe and cut a hole in the center. For an interesting effect
, use a saturated color to cut the hole out of. Tom Skelton, one of the best lighting designers of the past, used this technique often, and very effectively; known as a "color donut."
to one manufacturer.
2. Touring. Slang term for portable "wheel cups" used for stacking road
cases atop one another. See wheel cup
. Fried circular bagel-shaped pastry used as a reward, bribe, gratuity, or requisite.