Fig. 31: The advantage of air tanks mounted on the side instead of the back is: one can take them off when it gets narrow. This technique is known from cave divers. Here he dives under one of the trees in the lake and doesn't touch anything. — Nikon D200, Nikkor AF-S 10.5mm f/2.8 Fisheye, 2 x Sea & Sea YS-110α strobes, Lake Samaranger, Austria, 11 August 2013 — EXIF: Nikon D200; Δt=1/125 s; f=10.5 mm; f/4.5; ISO 200; 2013-08-11 15:09:37
