FLASH REVIEW

Camera Flash / Speedlight: Canon 550EX Speedlite Flash Unit Flashgun REVIEW

Model Name: Canon 550EX Speedlite Flash Unit Flashgun specifications.
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Release Date	September 1998
Strenght / Power
Guide Number (ISO100, meters)	Normal Mode (ISO 100)High-Speed Sync (FP Flash, ISO 100)
Power Level Switching (Vari-power Range)
Head & Coverage
Bounce (Up-Down) Head Movement
Swivel (Rotation) Head movement
Focal Length Coverage	24mm (APS-C 15mm)
Auto Zoom Head
Flash Related Functions
Flash Durations	0.2 ms or less
Flash Modes(TTL)	E-TTL II/E-TTL
Flash Exposure Compensation / Correction
Secondary Illumination
Wireles Flash
Wireless Operation
Wireless Groups
Wireless Channels	4
Remote Timing Modes	3
Other Features
Mount	Hot-shoe mount flash
Off Camera Terminal / External Connectors
Included Accessories
Other Functions
Power Source & Recycle Time
Power Source - Batterry	4x AA Alkaline, Rechargeable NiMH Batteries
External Power
Minimum Recycle Time (Charging time between shooting)	0.1 to 4 sec.
Battery Life	approx. 100-700 (flashes per set of batteries)
Dimensions & Weight
Dimensions	3.1 x 5.4 x 4.4" (80 x 138 x 112mm)
Weight	14.2 oz (405g)
The Canon 550EX Speedlite Flash Unit Flashgun, launched in September 1998, serves as a versatile and dependable lighting tool for photographers. It features a Guide Number of Normal Mode (ISO 100)High-Speed Sync (FP Flash, ISO 100), ensuring robust illumination. The flash unit features a coverage angle or a focal length of 24mm (APS-C 15mm). Its Hot-shoe mount allows for easy attachment to cameras, providing stability during shooting.
A notable feature is its Flash Duration capability of 0.2 ms or less. This wide range enhances adaptability across various lighting conditions, catering to both static scenes and fast-paced action photography.
The Canon 550EX Speedlite Flash Unit Flashgun is powered by using 4x AA Alkaline, Rechargeable NiMH Batteries, with an estimated battery life of approx. 100-700 (flashes per set of batteries), ensuring sustained performance during extended photo sessions.
The Minimum Recycle Time, 0.1 to 4 sec., emphasizes efficiency, enabling photographers to capture successive shots seamlessly, especially in dynamic shooting scenarios.
In addition, the Canon 550EX Speedlite Flash Unit Flashgun is compact and portable, the flash unit measures 3.1 x 5.4 x 4.4" (80 x 138 x 112mm) and weighs 14.2 oz (405g). This review aims to assist you in determining if this flash suits your specific needs.
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Fivercam Wiki information:

There are three ways to trigger off-camera flash units wirelessly: via infrared, radio signals or a hybrid method that involves both infrared and radio. The infrared system works like the TV remote; there need to be a direct line of sight for the signal to reach the destination. The radio signal has no line-of-sight limitations, but comes at a rather high cost. The hybrid system simply takes the infrared signal from the commander, converts it over to radio and then converts it back to infrared on slave units.

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