Pro Speedlite system flash, item no .: 17644, 20769, 20770, 20771, 20772, in the form of a battery-operated (lithium-ion battery or 4 mignon cells) electronic flash unit for attaching to the hot shoe of a photo camera, some with an LCD display with background light and a number of individual functions, e.g. B. a high-speed synchronization of 1 / 8000s or the so-called stroboscopic effect. The system flashes have a zoom range of min. 24 to max. 105 mm with a guide number of 58 (ISO 100, max. Zoom) and are designed for certain digital cameras from Canon or Nikon. Only the system flash Speedlite manual II (Art. 17644) is universally compatible with all digital cameras. Outer form: see illustration in the appendix
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[1][1]. DE24267/15-1#511595