TTL Auto Operating Range: 0.8 to 108.2 feet with a 50mm F/1.2 lens at ASA 100
Auto Sensor Angle: 20 degrees
Standard recycle times: 0.2 to 12 seconds
Flash Duration: 1/1500 to 1/30,000
Power Source Options: Grip Battery Pack - 6 AA Alkaline or NiCd batteries, TR Power Pack, Power Pack 510V or AC adapter
Weight: 27.2 oz.