Yongnuo YN600EXRTII Flash F/Canon

• Canon-Compatible 2.4GHz 15-Channel Radio
• Compatible with Canon E-TTL / E-TTL II
• Guide Number: 197′ at ISO 100 and 200mm
• Zoom Range: 20-200mm (14mm with Panel)
• Tilts from -7 to +90°
• Rotates Left & Right 180°
• Wireless Master/Slave TTL Functionality
• Recycle Time: Three Seconds (Alkaline)
• High-Speed,1st & 2nd Curtain Sync
• Runs on Four AA Batteries

The NEW 600ex-rtii from Yongnuo is the top of the line speedlight available for Canon users. It features built in radio communication so that you can reliably use it off camera and maintain complete control. The 600ex-rtII can be used as a master flash with other 600ex-rt's from both Canon and Yongnuo. It can be used as a slave off camera as well when controlled by another 600ex-rt, 600ex-rtII or with the YN-E3-RT controller. This speedlight also has the ability to be made to be an optically triggered slave or master flash and a slave to the built in system in many Canon cameras (infrared).  It features TTL capabilities, High Speed Sync, Rear Curtain Sync, Flash Exposure Bracketing, Flash Exposure Compensation and many other useful settings. This speedlight also can be used with an external battery pack if needed. An added feature of this speedlight, as with other TTL capable speedlights from Yongnuo is the ability to use this Canon version speedlight with the Nikon wireless system as well. If you want the best that there is to offer, this is it. The recycle time has been improved as well as a few other internal things to give it a step up from the previous version.