As well as dedicated studio use, flash may be used as the main light source where ambient light is inadequate, or as a supplementary source in more complex lighting situations. Basic flash lighting produces a hard, frontal light unless modified in some way. Umbrellas and softboxes are commonly used for this purpose (even with small hand-held flash units).
Fill flash or "fill-in flash" describes flash used to supplement ambient light in order to illuminate a subject close to the camera that would otherwise be in shade relative to the rest of the scene. The flash unit is set to expose the subject correctly at a given aperture, while shutter speed is calculated to correctly expose for the background or ambient light at that aperture setting.
Bounce flash is a related technique in which flash is directed onto a reflective surface, for example a white ceiling or a flash umbrella, which then reflects light onto the subject. It can be used as fill-flash or, if used indoors, as ambient lighting for the whole scene. Bouncing creates softer, less artificial-looking illumination than direct flash, often reducing overall contrast and expanding shadow and highlight detail, and typically requires more flash power than direct lighting.
Part of the bounced light can be also aimed directly on the subject by "bounce cards" attached to the flash unit which increase the efficiency of the flash and illuminate shadows cast by light coming from the ceiling. It's also possible to use one's own palm for that purpose, resulting in warmer tones on the picture, as well as eliminating the need to carry additional accessories.
Also, slave flash units exist that are set up away from the subject and camera, that are triggered by the light from the master flash. This slave flash provides fill or bounce light. Many small flashes and studio monolights have optical slaves built in. Wireless radio transmitters, such as PocketWizards are also popular for remote synchronization since the receiver unit can be around a corner, or well over 100 meters away (which would be far too difficult to trigger using an optical sync).
Another method that can be used is strobe. Some high end units can be set to flash a specified number of times at a specified frequency. This allows action to be frozen multiple times in a single exposure.
Colored gels can also be used to change the color of the flash. Correction gels are commonly used, so that the light of the flash would be the same as the tungsten lights (using a CTO gel) or the fluorescent lights.
Read more about this topic: Flash (photography)
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Technique may also refer to:
- The Techniques, a Jamaican rocksteady vocal group of the 1960s
- The Technique, the school newspaper of the Georgia Institute of Technology
- Technique, the yearbook of the Massachusetts Institute of Technology
- Technique (album), a 1989 album by British rock group New Order
- Technique (band), British female synth pop band in the 1990s
- "Technique" (song), an instrumental song by Linkin Park on their Hybrid Theory EP
Famous quotes containing the word technique:
“The mere mechanical technique of acting can be taught, but the spirit that is to give life to lifeless forms must be born in a man. No dramatic college can teach its pupils to think or to feel. It is Nature who makes our artists for us, though it may be Art who taught them their right mode of expression.”
—Oscar Wilde (18541900)
“The more technique you have, the less you have to worry about it. The more technique there is, the less there is.”
—Pablo Picasso (18811973)
“A successful social technique consists perhaps in finding unobjectionable means for individual self-assertion.”
—Eric Hoffer (19021983)