Schematics of the effect of the camera shadow. A muon passes beside (left) or through (right) the camera (in brown), before hitting the mirror (in violet). The Cerenkov light pool emitted below the camera is marked in solid black. The projected additional shadows (green) depend on the impact distance and the focal distance F of the camera; nevertheless, the total shadow adds up to exactly the length of the chord, using Equation (38). Note that the Cerenkov angle has been exaggerated for better visibility.