Fig. 19: Two empty clamshells. It was just a test shot for the right camera settings, but despite of some caddisfly larvae there was nothing more interesting on this dive site. Dive #645: Swimming bath Brugg, Aare. — EXIF: Nikon D200; Δt=1/250 s; f=105 mm; f/22.0; ISO 200; 2018-05-04 9:15:55
