Fig. 9: One of the tree swans on the river Aare near Vogelsang AG. It is a test shot with my used bought Nikkor 300mm f/2.8 and Nikon TC-20E II teleconverter. There's very little depth of focus when it is fully open. — EXIF: Nikon D3; Δt=1/4000 s; f=300 mm; f/3.2; ISO 200; 2018-04-27 9:28:24
