Profoto B1 500 AirTTL Battery Powered Flash

Buy on Amazon.com : http://www.amazon.com/gp/product/B00GGJ18NM?tag=catfoodrevi0a-20

Profoto B1 500 AirTTL Battery Powered Flash

The B1s patent-pending technology fully integrates the flash head with your Canon camera The integration is so complete that Profoto sometimes refers to the B1 as an off-camera flash The key to this control is the Air Remote TTL-C
It has 8 frequency channels with 3 groups per channel and a range of up to 330 for TTL triggering Each channel has power ratio capability of - 2 stops in TTL or - 9 stops in manual Modeling light shut-down of the unit and first or rear curtain exposure can also be selected
The B1s Lithium-ion battery gives you up to 220 full power flashes and thousands of minimum power flashes on a 2-hour charge from the provided 28A multi-voltage charger An optional 45A quick charger shortens that time to 1 hour
In Normal Mode which prioritizes color fidelity the B1 500 AirTTL is capable of t05 flash durations of 111000 sec at minimum power and 11000 sec at full power
Freeze Mode automatically selects the shortest flash duration possible at the user-selected power level Motion-stopping flash durations of 119000 at minimum power make the B1 500 AirTTL ideal for high speed shooting