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Location Lighting for Television by Alan Bermingham

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10

Dimmers on Location

Dimmers can be used on location to enable:

  • swift balance of light sources without the need for scrim/ND filters
  • on-cue lighting changes to be affected.

Tungsten sources change their colour when dimmed (refer to p. 76 for a discussion on this topic). Fluorescent sources may have a dimmer integral with the lamp ballast. When dimmed the fluorescent light does not change its colour significantly.

Dimming control may be by:

  • local control on the luminaire
  • 0–10 V
  • DMX signal.

HMI/MSR sources using flicker-free ballasts have an integral dimmer with a local dimming control 100–50%. However, the change in colour with dimming may not be tolerable. Consequently, these sources should be fitted with a mechanical dimmer (shutter) ...

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