July 2013
Beginner
304 pages
7h 49m
English
Content preview from Location Lighting for TelevisionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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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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