Tufted Duck Tufted Duck, Prague, Czechia, October 7, 2024Canon EOS R5 with Canon 100-500 mm L-series lens; 500 mm; ISO-1600; f/8; 1/800 sec. This page is for the Tufted Duck (Aythya fuligula). Tufted Duck, Prague, Czechia, October 7, 2024Canon EOS R5 with Canon 100-500 mm L-series lens; 500 mm; ISO-1000; f/7.1; 1/800 sec. Tufted Duck, Prague, Czechia, October 7, 2024Canon EOS R5 with Canon 100-500 mm L-series lens; 500 mm; ISO-200; f/8; 1/800 sec.