Canon Speedlite 270EX II Flash Specifications: Type: On-camera, E-TTL II/E-TTL autoflash Speedlite Flash Coverage: - EF lens: 28mm/50mm - EF-S lens: 17.5mm/31.3mm - Manual switching Custom Functions: 1) C.Fn-01: Auto power off (Enabled/Disabled) 2) C.Fn-06: Quick flash w/continuous shot (Disabled/Enabled) 3) C.Fn-10: Slave auto power off timer (60 minutes/10 minutes) 4) C.Fn-11: Slave auto power off cancel (Within 8 hours/within 1 hour) Transmission Range: Reception of all channels via light pulse signal reception on the master unit Reception Angle: ±45° horizontally and ±25° vertically, facing the transmitter on the master unit Compatibility: Type-A EOS cameras (E-TTL II/E-TTL autoflash) Guide Number: Normal (24mm): 22 (ISO 100 (m)), 72 (ISO 100 (ft.)) Tele (50mm): 27 (ISO 100 (m)), 89 (ISO 100 (ft.)) Bounce / Swivel: Up: 60°, 75°, 90° ...