The early Minox cameras from Riga to Minox B, BL and AX, were equipped with a mechanical shutter, while later model Minox ( C, LX, EC, TLX ) cameras have an electromagnetic shutter. When closed, the viewfinder and lens windows are protected. Complan lens and Minox lens are unit focusing lens, focusing from 8 inches (20 cm) to infinity through precision gear linked to a focusing dial on top of the camera. All Minox cameras, except the EC and MX, have a parallax correction viewfinder: when the focusing dial moves, the viewfinder moves in tandem to correct for parallax.