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Colour frames are placed directly outside the fixture, immediately in front of lens assembly. Most fixtures include an integrated holder for the frame. Some accessories designed to mount in the gel frame holder, such as Barn Doors, occasionally include an integrated replacement slot for frames.
Fresnel lenses can be placed close to the light source and are inexpensive to produce. In film lighting lenses range in size from 2 to 24 inches, and lamp power between 150 W and 24,000 W. Fresnels use a spherical reflector, with the filament of the lamp at its focus point. This effectively doubles the light delivered by the fixture, as all ...
Light fixtures may also have other features, such as reflectors for directing the light, an aperture (with or without a lens), an outer shell or housing for lamp alignment and protection, an electrical ballast or power supply, and a shade to diffuse the light or direct it towards a workspace (e.g., a desk lamp).
Most manufacturers now use field angle to indicate the fixture's spread typically in this series (5°, 10°, 19°, 26°, 36°, 50°, 75°, 90°). Older fixtures are described by the width of the lens x focal length of the instrument. For example, a 6x9 ellipsoidal would have a 6" diameter lens and a focal length of 9".
Bill Clinton is one proud grandpa!. On Monday, Nov. 25, the former President of the United States, 78, appeared on an episode of Live with Kelly and Mark and spoke about how he and the former ...
WORCESTER, Mass. – Local police in this central Massachusetts city used excessive force and engaged in “outrageous” sexual contact with women during undercover operations, a two-year civil ...
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