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Focus On Lighting Photos Focus on the Fundamentals.pdf

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<str<strong>on</strong>g>Focus</str<strong>on</strong>g> <str<strong>on</strong>g>On</str<strong>on</strong>g> <str<strong>on</strong>g>Lighting</str<strong>on</strong>g> <str<strong>on</strong>g>Photos</str<strong>on</strong>g><br />

Quartz-haLogen<br />

Quartz-halogen lights are good tools for photographers who often shoot<br />

moti<strong>on</strong>. They have ordinary tungsten filaments, but <strong>the</strong> glass has some<br />

quartz, unlike ordinary silic<strong>on</strong>-based glass. The inside of <strong>the</strong> lamp is<br />

filled with an inert halogen gas, which keeps <strong>the</strong> filament from oxidizing<br />

(burning up!). They typically produce about 60% to 70% more light than<br />

ordinary tungsten lights of <strong>the</strong> same wattage. Usually more expensive<br />

than ordinary household tungsten, but much less expensive than flash,<br />

<strong>the</strong>se c<strong>on</strong>tinuous lights are always <strong>on</strong>. The fact that <strong>the</strong>y d<strong>on</strong>’t flash<br />

allows seeing moti<strong>on</strong> over whatever exposure time we choose.

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