The Lumedyne X4BC 400W/s Booster Module is the smallest, lightest, easiest and least expensive way to add an f-stop to a 400W/s power pack system.
Boosters only effect the highest setting on a power pack. Boosters require a power pack to run from a battery.
- On / Off switch for boost power
- Contain extra capacitors to increase the total watt/seconds available
- When you double the W/s you gain one f-stop (200W/s to 400W/s or 800W/s to 1600W/s) and get half as many flashes per charge