Term - Slave unit

Slave unit SWPP Photographic Glossary

Wednesday 14th January 2026  

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Slave unit

A flash accessory, also known as a slave cell thats used to fire another flash remotely so that multiple flash set ups can be arranged without cables and all synchronised with the cameras shutter. A mechanism which fires other flash sources simultaneously when a photo electric cell is activated by the illumination emitted by a camera linked flash.



 

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