April 2013
Beginner
224 pages
7h 22m
English
Content preview from Basic Betacam Camerawork, 3rd Edition
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Cold light
The use of high-frequency fluorescent lights has become a viable option both in studios and on location. The merits of such lights compared to tungsten are:
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greater efficiency, or more correctly efficacy, producing 3 to 4 times more light than tungsten sources. Tungsten halogen produces 25 lumens/watt, whereas fluorescent lamps, depending on type, can produce up to 100 lumens/watt. |
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no radiant heat in the light beam, unlike tungsten sources which radiate typically 55% of lamp power in the beam. This means the artistes are more comfortable under cold light sources. |
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fluorescent luminaires usually use several lamps to produce a practical light source, hence they are soft sources, i.e. not point sources. This results in less ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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