Sigma - Sigma EF-610 DG ST Flash

With A Powerful Guide Number Of 200' At Iso 100 And 105Mm, The?Sigma Ef-610 Dg St Flash?Works With Canon E-Ttl / E-Ttl Ii And Offers Users The Ability To Illuminate The Subject Or Scene Both On Camera And Off. The Unit Also Has A Zoom Range Of 24-105Mm With Full Frame Cameras And Has A Wide-Angle Panel That Will Extend This To 17Mm. The Head Will Tilt From -7 To 90? And Rotate Right 90? And Left 180? For Full Bounce Capabilities. And, It Has Wireless Master And Slave Ttl Functionality.