General
MPN: Speedlite550EX
Width: 3.1 in
Depth: 4.4 in
Height: 5.4 in
Weight: 14.3 oz
Enclosure Color: Black
Enclosure Material: Plastic
Localization: English
Camera flash
Type: Hot-shoe clip-on flash
Guide Number (m / ISO 100): 55
Lens Coverage: 24mm - 105mm
Supported Exposure Control: TTL, E-TTL
Shooting Range: 20 in - 125 ft
Vertical Rotation Angle: +90 / -7
Horizontal Rotation Angle: +180 / -90
Color Temperature: Daylight
Zoom: Automatic, manual
Manual Power Control Levels: 1/1, 1/64, 1/128, 1/2, 1/4, 1/8, 1/16, 1/32
Auto Shut-Off: Yes
Miscellaneous
Carrying Case: Soft case
Camera flash
Features: AF illuminator, illuminated LCD display, flash +/- compensation, wireless off-camera control
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Manufacturer's product description
Speedlite 550EX is the main component of a flash system designed together with the EOS-3 SLR camera. It provides full compatibility with the area AF technology employed by the EOS-3 and refined E-TTL autoflash for improved performance. Other main features include a maximum Guide Number of 180 (ISO 100, ft.), an AF-assist beam which links to the EOS-3's 45-point area AF, FP Flash (high speed sync), FE lock (a flash version of AE lock), and FEB (Flash Exposure Bracketing). The Speedlite 550EX also incorporates a built-in wireless transmitter, which can control other Speedlite 550EX units set up as slave units. Flash coverage is set automatically from 24mm to 105mm, and a wide-angle panel extends the coverage to 17mm. The Speedlite runs on 4 AA-size batteries, and can also be used with optional external power supplies such as Compact Battery Pack E and Transistor Pack E.
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