Product Description: The Canon Speedlite 580EX is a powerful external flash unit designed for Canon EOS cameras. It offers advanced features suitable for professional photographers and enthusiasts alike, providing versatile lighting solutions for various shooting conditions. Product Features: Guide Number: 58 (meters at ISO 100), providing ample light output for a range of distances. TTL Flash Metering: Through-the-Lens metering for accurate flash exposure in all lighting conditions. Zoom Flash Head: Covers focal lengths from 24mm to 105mm, with a wide-panel diffuser for coverage down to 14mm. Wireless Flash Capability: Can act as a master or slave unit in wireless multi-flash setups, offering creative lighting options. High-Speed Sync (HSS): Allows for synchronization with fast shutter speeds up to 1/8000s, ideal for freezing motion. Manual Power Control: Adjust flash power in 1/3-stop increments for precise lighting control. Custom Functions: Customize settings to suit specific shooting preferences and situations. LCD Panel: Clear display for easy navigation and adjustment of settings. Sturdy Build: Durable construction with weather-sealing for reliable performance in various conditions. Condition: Used Product Information: Brand: Canon Model: Speedlite 580EX Flash Type: Shoe-mount external flash Guide Number: 58 (meters at ISO 100) Flash Coverage: 24mm to 105mm (14mm with wide-panel diffuser) Flash Modes: E-TTL II, Manual, Multi Flash Duration: 1/1050 to 1/20,000 second Recycle Time: Approximately 0.1 to 6 seconds Wireless Flash Control: Master, Slave, Wireless Slave Custom Functions: 13 custom functions available Power Source: 4 x AA batteries (not included) Dimensions (W x H x D): Approx. 76 x 134 x 114 mm (3.0 x 5.3 x 4.5 inches) Weight: Approx. 375g (13.2 oz) without batteries What's Included: Canon Speedlite 580EX Flash Stand Soft Case