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Multiple flash (wireless or wired) |
| This is a flash setup where there is one or more Speedlites other than the one attached to the camera. In a wired system, multiple Speedlites are connected with a multi-Speedlite connecter and extension cords. In a wireless or slave unit system, multiple Speedlites can fire without any wired connections. With Speedlite Transmitter ST-E2 or Speedlite 550EX set as the master unit, multiple Speedlite 550EXs can be controlled by wireless for E-TTL autoflash. |
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Autoflash metering |
| The camera's light sensor meters the light reflected by the subject alter the flash is fired. The flash duration is then controlled instantly so that the proper flash exposure is obtained. |
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Diffused light |
| Light can be diffused by placing tracing paper over the light source or bouncing it off a white surface. Diffused light gives soft lighting effects since the light is spread around more. It also reduces contrast.
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Bounce flash |
| Bounce flash is created when the Speedlite is pointed toward a ceiling or wall so that the flash bounces off before reaching the subject. Since the color of the bounce surface will also be reflected, a white or light-colored surface is best. Since the light loss is greater with bounce flash than with direct flash, a larger flash aperture should be set. Also, the Speedlite's batteries will become exhausted faster since a larger flash output is required.
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Pop-up flash |
| This is the mechanism for the built-in flash which pops up from a retracted position. With fully automatic SLR cameras, the built-in flash pops up automatically when necessary. |
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Preflash |
| This is the Iow-output flash fired before the main flash is fired in synchronization with the shutter. It is used for measuring the subject distance, evaluative metering, or reducing red eye. |
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Recycle time |
| Speedlites use a capacitor to store electrical energy for
the high voltage required by the flash. When a flash is fired, the capacitor is discharged. The capacitor is then recharged for the next flash. The recycle time is the time it takes the capacitor to recharge enough to enable another flash to be fired. |
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Stroboscopic flash |
| This is a series of flashes fired in a single burst while the shutter is open. Stroboscopic flash is effective for capturing the movement (for Iater analysis) of a moving subject against a dark background. |
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Main flash |
| Normally, this is the light which strikes the subject over the widest area. It can also be the light which gives the subject dimension or character regardless of how large the illuminated area is. |
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Modeling flash |
| Before the flash picture is taken, a modeling flash can be fired so that the lighting effects balance, shadows, etc.) can be checked before hand. |
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