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JJC Optical Flash Slave Trigger Wireless ISO 518 Hot Shoe Sync Speedlight Adapter with PC Socket 1/4 Thread for Canon Nikon Sony
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Amazon.com : Optical Flash Slave Trigger JJC Hot Shoe Sync Adapter with PC Socket,Optical Sensor & 1/4"-20 Threaded Socket Cold Shoe for All Flashes Speedlight with Standard ISO 518 Hot Shoe-1 Pack :
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