Lunch atop a (Springfield) skyscraper

Lunch atop a (Springfield) skyscraper
by andy-m                

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transmitter and receiver units which enable off-camera flash

wireless triggers use infrared or radio frequencies to communicate between a camera body and an off-camera flash without the need for a (wired) sync cord. Infrared systems, such as Nikon's CLS, require line-of-sight to fire consistently, while radio units have greater range and do not require the flash to be in plain view of the camera.

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