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SU-4 Wireless Remote TTL Flash Controller

Part #: 3070
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The Nikon SU-4 Wireless Remote TTL Flash Controller enables wireless remote flashes with automatic TTL or manual exposure control. It can be attached to some current and prior Nikon Speedlight models and cameras. It detects the firing of the master flash (including built-in Speedlight) and sends a firing start signal to the slave unit. It terminates the firing of the slave flash by detecting firing stop signal and eliminates the need for connecting cord.
The SU-4 operates effectively up to 23 or 25 feet from the location of the main flash.

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