ost DSLR shooters take through-the-lens (TTL) flash metering for granted, thanks to the ubiquity of automatic hot-shoe units. But many studio and location photographers have had to trade convenience for power—until Profoto launched the B1 AirTTL system. I borrowed a set of 500 watt-second lights and controller for review. Setting up this “off-camera flash” system felt like using speedlights. I didn’t have to run any cords or attach any battery packs. I didn’t even worry about adjusting the flash power on the back of the head. I just set the lights on stands, put the Air Remote TTL-C onto a Canon EOS 5D Mark III, and fired a test shot. To my surprise, I got a usable first frame. The B1 has a lot in common with a typical monolight. There’s a display on the back of the head that indicates flash power and remaining battery, as well as a knob to control the built-in modeling light. Adjusting output, however, is done completely through the remote that mounts in the camera’s hot shoe.