Fig. 39: This is diving when the visibility is okay to bad. Pointing the lamp towards the camera causes a patch of colour in the usual black/green pictures. — Nikon D200, Nikkor 10.5mm DX Fisheye, Rütenen/Beckenried, Lake Lucerne, 6 September 2009 Nikon D200; Δt=1/80 s; f=10.5 mm; f/4.5; ISO 400; 6 September 2009 10:42:47
