TTL in 2007

Alex Mustard · Issue 34, Jan/Feb 2007 · pp. 29–33

Products mentioned: Ikelite DS125, Ikelite housing, Nikon D80, Nikon D100, Nikon SB80DX, Inon D2000, Inon UWL 165, Subal housing, Subtronic Alpha, Fuji S2

TTL in 2007 by Alexander Mustard Looking back several years to the early days of the proliferation of digital photography underwater it is surprising what we worried about. One of the biggest concerns for many of us in the transition from shooting film to shooting digital was being without TTL flash metering. (TTL is a system where the camera measures and controls the output of a strobe Through The Lens, quenching the light when the correct exposure has been reached.) We have come a long way since then. At the time, underwater strobe designers had a technological mountain to climb to make TTL available for the wide variety of cameras we were using underwater. Not only were the likes of Nikon, Canon and Olympus very secretive about the electronic protocols used for their various flavours of TTL, but it also seemed as if they varied the TTL recipe with each of new model of camera. And yet …