A flash unit made to fully support today's sophisticated digital SLR cameras is the Sunpak PZ42X TTL Flash. It works flawlessly with cameras that support P-TTL and Sony/Minolta ADI. Features that work with P-TTL and Sony/Minolta ADI DSLRs 138' at ISO 100 and 105mm is the guide number. Zoom Range: 20mm with Panel; 24-105mm Tilts Up 90° Rotates Left 180° & Right 120° AF Support The light 3.5 seconds at full power for recycling Powered by four AA batteries Details At ISO 100, Guide Number 137.8' / 42 m (105 mm Position) 24-105 mm of coverage (20 mm with panel) Coverage Angle: 23 to 84° Auto Zoom Head Yes, Swivel Head 300°, Bounce Head 0 to +90° A flash Time frame: 1/500–1/13000 seconds Time Spent Reusing About 3.5 Seconds Secondary Lighting No Exposure Control Minilta/Sony ADI/-P-TTL