Wireless Remote Flash Controller
This compact unit simplifies and improves off-camera flash operation. It attaches to the camera's hot shoe to control a combination of two off-camera flash units with a lighting ratio of 2:1, or any variety of flash unit combinations. An infrared light conveys signals. Remote off-camera flash control can be used even in macro photography as close as 20cm, the minimum working range of the AF 50mm f/2.8 Macro, without effecting the exposure.
Compatible flashes: SF-1, 2000xi, 3500xi, 5400xi, 3600HS, 5400HS, 5600HS