electronic flash
photography
Also known as: electric flash
Learn about this topic in these articles:
use in photography
- In technology of photography: Electronic flash
The most common flash system depends on a high-voltage discharge through a gas-filled tube. A capacitor charged to several hundred volts (by a step-up circuit from low-voltage batteries or from the line voltage supply) provides the discharge energy. A low-voltage circuit generating a…
Read More - In technology of photography: Flash exposures
Most current electronic flash units incorporate a sensor cell that measures the light reflected from the subject and controls the flash duration (and hence the exposure) accordingly. In certain cameras in which photocells measure the light reflected from the film, the same cells can similarly control the…
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