Specifications: Number of Flashes: Approx. 100–700 flashes.
Compatibility: Type-A EOS cameras (E-TTL II / E-TTL autoflash)
Type-B EOS cameras (TTL autoflash)
Guide Number: Approximately 49.2 ft. at ISO 100.
Maximum Guide No. is approximately 196.9 ft. at ISO 100 and 200mm flash coverage.
When the extendable wide panel is pulled out, the flash coverage is 14mm.
Specifications: Commander FunctionYes Remote FunctionYes Guide Number28m/92ft. (at ISO 100, 35mm zoom head position, in FX format, standard illumination pattern, 20?C/68?F) to 39m/128ft. (at ISO 200, 35mm zoom head position, in FX format, standard illumination pattern, 20?C/68?F) Electronic ConstructionAutomatic Insulated Gate Bipolar Transistor (IGBT) and series circuitry Flash Exposure Controli-TTL Balanced