Cactus Laser Trigger LV5 Camera Remote Control, Black : Photographic Lighting Slave Remote Triggers : Electronics - Amazon.com
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MIOPS Mobile RemotePlus Smart Camera Trigger for High Speed Photography with Laser/Sound/Lightning Detection Sensor - S1 Cable for Sony, Konica Minolta, and Hasselblad Cameras - Walmart.com
This is the most frugal DIY clamp for high speed laser triggers - DIY Photography