Image 1: Canon EOS-1D X + Samyang 14mm f2.8 lens; 35 sec at f22 and at f5.6; ISO 640; x2 Canon 600 strobes; home-made underwater housing.
Image 2: Canon EOS-1D X + Tamron 70-200mm f2.8 lens at 70mm; 1/250 sec at f3.5; ISO 2000; x2 Canon 600 flashes; 3200 lumen LED torch.
Image 3: Canon EOS 5D Mark III + 16-35 mm f2.8 lens + ND 0.6 graduated filter; 1/200 sec at f6.3, ISO 2000; Aquatech housing.
Image 4: Canon EOS 5D Mark III + 8-15mm f4 lens at 15mm; 1/160 sec at f10; ISO 2500; Canon 600 flash; Aquatech housing.
Image 5: Canon EOS 5D Mark III + 8-15mm f4 lens; 1/160 sec at f10; ISO 1000; Canon 600 flash; Aquatech housing.
Image 6: Canon EOS 5D Mark III + 8-15mm f4 lens at 15mm; 1/2500 sec at f8; ISO 2000; underwater housing + specially designed remote control.
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Audun Rikardsen, Norway
Audun grew up in northern Norway and has always been fascinated by the Arctic coast. He works full-time as a professor of biology at the University of Tromsø. As a part-time photographer he integrates photography into his fieldwork and uses his images to inspire his students and make his scientific results public.