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• Wireless Flash
Transmission method: Optical pulse
Channels: 4
Wireless options: OFF, Master, and Slave
Transmission
range
(Approx.):
Indoors: 12 - 15 m
/39.4
- 49.2 ft.,
Outdoors: 8 -
10m
/26.2
- 32.8
ft.
Master unit reception angle: ±40° horizontal, ±30° vertical
Controllable slave groups: 3 (A,
B,
and C)
Flash ratio control: 1:8 -
1:1
-
8:1
in
1/2-stop increments
Slave-ready indicator: AF-assist beam blinks
Modeling flash: Fired with camera's depth-of-field preview button
• Custom Functions: 14 (32 settings)
• AF-Assist Beam
Linkable AF points: 1 - 45 AF points (28mm or longer focal length)
Effective range (Approx.): At center: 0.6 -
10m
/2.0
- 32.8 ft.,
Periphery: 0.6 - 5 m
/2.0
- 16.4
ft.
• Power Source
Internal power:
Battery life
(Approx. flash count):
Wireless transmissions:
Power saving:
External power:
• Dimensions
(W x H x D):
• Weight (Approx.):
Four size-AA alkaline batteries
* Size-AA Ni-MH and lithium batteries also usable
100 - 700 flashes (with size-AA alkaline batteries)
Approx. 1500 transmissions (With master unit firing disabled
and size-AA alkaline batteries)
Power offafter certain period ofidle operation (Approx. 1.5 min.
to
15
min.) (60 min. ifset as slave)
Compact Battery Pack CP-E4
76 x 137 x 117 mm / 3.0 x 5.4 x 4.6 in.
(excluding dust- and water-resistant adapter)
405 g / 14.3 oz. (Speedlite only, excluding batteries)
All specifications above are based on Canon's testing standards.
Product specifications and external appearance are subject to change without
notice.
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