High Speed Sync as Fast as 1/8,000 Sec.
High-Speed Sync (HSS) is the technical term for syncing flash with shutter speeds shorter than the so-called x-sync – typically 1/250 of a second. It is a useful tool for controlling ambient light and for freezing action. Profoto uses a unique, patent-pending technology, providing an extremely fast series of flash pulses. With the free Profoto HSS upgrade installed, you switch to HSS Mode with a simple button-press that allows you to shoot at shutter speeds as fast as 1/8,000 of a second.
Exceptionally Short Flash Duration
In Normal Mode, which prioritizes color fidelity, the B1 500 AirTTL is capable of t0.5 flash durations of 1/11,000 sec. at minimum power, and 1/1,000 sec. at full power.
Freeze Mode automatically selects the shortest flash duration possible at the user-selected power level. Motion-stopping flash durations of 1/19,000 at minimum power make the B1 500 AirTTL ideal for high speed shooting.
Quick Burst Mode
At lower power settings Quick Burst Mode allows a series of flashes to be fired at a faster pace than the B1 can recharge, allowing triggering of up to 20 frames per second.
Lithium-ion Battery Powered
The B1’s 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 2.8A multi-voltage charger. An optional 4.5A quick charger shortens that time to 1 hour. Fuel gauge type LEDs on both the battery and charger allow you to monitor remaining power.
LED Modeling Lamp
A 20W LED modeling light with a 70W tungsten-equivalent output draws very little power from the battery and generates minimal heat. The light can be set to proportional or full power and will dim during recycling if that option is selected.
Redesigned Control Panel
The B1’s control panel has been upgraded with a 1.4 x 2.5″ bright LCD screen that informs the user of the flash’s Power level, sync choice, modeling light mode and recycle alert. There’s also a large battery gauge that literally can be read from 20′ away
Power Variable over 9 Stops
Power can be regulated over a 9-stop range (2.0 – 500W/s / 1/256 – 1/1) in 1/10 or 1-stop increments.
Full Light Shaper System Compatibility
With its zoom scale and integrated umbrella sleeve, the B1 500 AirTTL is compatible with Profoto’s extensive line of umbrellas, reflectors and softboxes.