Posts Tagged ‘slave’
Jonathan Dandrow believes that traffic enforcement cameras are “dangerous, invasive, error-prone, and unconstitutional,” so he decided to find a way to turn camera technology against those cameras. He ended up creating the noPhoto, a high-tech license plate frame that makes it impossible for a red light or speed trap camera to snap a useable photograph of your plate.
Optical sensors are a cheap way to trigger slave flashes if you don’t want to pay for a wireless transmitter, but the fact that you’re firing your on-board flash to trigger the sensors limits your creative options. Flickr user Victor came up with the idea of turning an on-camera flash unit into an infrared transmitter by covering up the flash with a filter. The filter is simply a piece of processed (but unexposed) E6 slide film — it blocks visible light, making it completely black, but allows infrared light to pass through and trigger optical sensors.
Using Infra Red Masters To Trigger Optical Slaves [DIYPhotography]