goggle lens the film advance mechanism can be mechanical as illustrated with a knob 34 mounted at one end of a flexible cord 36 see fig1 which extends into the actuator 32 to advance the film 26 across the main lens 14 the wearer grasps the knob 34 and pulls or extends the knob away from the goggle to thereby rotate the axle 30 and move the film from the supply magazine 20 to the take up magazine 22 upon release of the knob 34 an internal spring loaded pall and ratchet system will retract the cord 36 and knob 34 towards the actuator 32 one example of a suitable mechanical drive actuator mechanism and other details are shown in smith u s pat no 4 428 081 the contents of which are incorporated by reference herein however other known forms of actuators can be used including an electric drive powered by a battery such as the efs goggle system previously sold by the present assignee scott usa the supply magazine 20 as seen in fig2 consists of a plastic housing 40 having a side flange which is through bolted to the main lens 14 more particularly the main lens 14 includes a mounting hole 42 see fig3 which receives a screw 44 as seen in fig2 to secure the flange to a rear mounting bar 46 located on an interior side of the main lens 14 the rear bar 46 has a threaded hole for receiving the screw 44 the lens 14 also includes a pair of alignment holes 48 see fig3 which receive a pair of pins extending either from the rear bar 42 through the lens and into the side flange or.