Donuts are used in the colour 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...

Donuts are used in the colour 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...

Donuts are used in the colour 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...

Donuts are used in the colour 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...

Donuts are used in the colour 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...

Donuts are used in the colour 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...