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STROBOSCOPIC APPARATUS-NAMELY, FLASH LAMPS, LENSES AND REFLECTORS, FLASH HEADS, DOORS AND LENS HOLDERS, COOLING APPARATUS, FOCUS CONTROLS, AIR FILTERS, CABLE CONNECTORS, CONTROL CONSOLES INCLUDING POWER SUPPLIES AND CONTROLS, LIGHT PULSE GENERATORS AND PULSE TIMERS, MOTION PICTURE AND VIDEO RECORDING EQUIPMENT USED IN CONJUNCTION WITH STROBOSCOPIC APPARATUS, REMOTE FREQUENCY, REMOTE START/STOP AND REMOTE SINGLE FLASH CONTROLS AND APPARATUS FOR THE OPTICAL CONTROL OF STROBED LIGHT INCLUDING EXPOSURE METERS, "BARN DOORS" AND FILTER, GEL AND SCRIM HOLDERS