From Manufacturer
The Omicron OM3 TTL Flash and Auto-Tracking Video Light from Quantum Instruments allows users to take TTL flash photos while simultaneously capturing video. A "chromatically correct" LED array – a mix of high quality white and colored LEDs – delivers true color rendition. Both the flash and continuous light produce a 60° beam angle with 5000K temperature.
Auto-Tracking for continuous video lighting adjusts the light output as you dolly in or out, over a 2 to 1 change in distance. With an optional CoPilot in your camera's hot shoe, OMICRON 3 becomes a dedicated TTL flash, and remote Qflashes are wirelessly linked with Omicron and your camera in TTL or Manual mode. The OM3 is compatible with lenses up to 3.9" in diameter and can use a Quantum Turbo battery. A mounting bracket is included.