A fuel cell system having a reforming reactor is disclosed, in which condensed water generated in the reforming reactor is drained during the warming-up of the system, so as to quickly complete the warming-up. Sensing whether a procedure, in particular a gearshift operation, is to be conducted. When viewed on the screen of a computing device executing the modules of the game system, the everyday objects are transformed into elements of an AR terrain while the game pieces can be augmented with various controls. Upon focusing from an infinite object point to the nearest object point, the second lens group G2 moves in the optical axis direction, the third lens group G3 moves toward the object side and the aperture stop S moves together with the third lens group G3 while the space between adjacent lens groups changes.