Canon Speedlite 90EX - Manual (Page 33)

31
 Wireless Master Function ..... Optical pulse method
Transmission channel ...................... 1 - 4
Transmission angle .......................... Approx. ±40° horizontally and approx. ±30° vertically
Transmission distance ..................... Indoors: Approx. 0.7 - 7 m / 2.3 - 23.0 ft., Outdoors:
0.7 - 5 m / 2.3 - 16.4 ft.
Slave unit control ............................. 3 groups (A/B/C)
Flash ratio ........................................ 8:1 - 1:8, 1/2-stop increments
 AF-Assist Beam ....................... Intermittent flash firing
Effective range: Center: Approx. 2.8 m / 9.2 ft.,
Periphery: Approx. 2.5 m / 8.2 ft.
 Power Source
Battery.............................................. Two size-AAA/LR03 alkaline batteries
Recycling time.................................. Approx. 0.1 - 5.5 sec.
Battery life (flash count) ................... Approx. 100 flashes or more
 Dimensions (W x H x D)........... 44.2 x 52 x 65 mm / 1.7 x 2.0 x 2.6 in.
 Weight ....................................... Approx. 50 g / 1.8 oz. (excluding batteries)
 All specifications above are based on Canon’s testing standards.
 Product specifications and external appearance are subject to change without notice.
COP
Y