Canon Speedlite 600EX II-RT Specification Guide (en)

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Flash
Compatible Cameras
Type-A EOS cameras (E-TTL II/E-TTL autoflash)
Type-B EOS cameras (TTL autoflash)
Guide Number
The Guide No. is approximately 49.2 ft./15m at ISO 100.
The maximum Guide No. is approximately 196.9 ft./60m at ISO 100 and 200mm flash coverage.
When the extendable wide panel is pulled out, the flash coverage is 14mm.
Number of Flashes
Approx. 100–700 flashes. 
* Nominal min. time when using 1900mm Ah type AA/HR6 Ni-MH batteries.
* Based on Canon Testing Standards.
Recycling Time
Normal flash: 0.1–5.5 sec. 
Quick flash: 0.1–3.3 sec. 
* Nominal min. time when using 1900mm Ah type AA/HR6 Ni-MH batteries.
* Based on Canon Testing Standards.
Flash Range
Effective flash range with EF 50mm f/1.4 lens at ISO 100
1) Normal Flash: Approx. 1.6–91.2 ft./0.5–27.8m
2) Quick Flash (at Guide No. 68.2 ft./20.8m): Approx. 1.6–48.6 ft./0.5–14.8m
3) High-speed Sync (at 1/250 sec. shutter speed): Approx. 1.6–48.2 ft./0.5–14.7m
AF Assist Beam
System:
Infrared AF-assist beam
Compatible AF System:
TTL second image formation phase-difference AF
Supporting 1–65 AF points (28mm or longer focal length)
• Phase-difference AF during viewfinder shooting
• Quick mode during Live View shooting or movie shooting
 
Effective Range (Approx.):
At center: 2.0–32.8 ft./0.6–10.0m
At periphery: 2.0–16.4 ft./0.6–5.0m
Custom Functions
15 Functions
Personal Functions
6 Functions
General
Power Source
Four AA-size/LR6 alkaline or AA/HR6 Ni-MH batteries
External Power Source
Compatible (Compact Battery Pack CP-E4N recommended)
Dimensions (W x H x D)
Approx. 3.10 x 5.64 x 4.83 in./78.7 x 143.2 x 122.7mm
Weight
Approx. 15.34 oz./435g
Specifications