Foucaultsches Pendel-Foucault's pendulum

NIKON D80, AF-S DX VR Zoom-Nikkor 18-200mm f/3.5-5.6G IF-ED [II] or AF-S DX VR Zoom-Nikkor 18-200mm f/3.5-5.6G IF-ED, 18.0 mm, 3.5, 1/15, 500