Specifications: Type: Ring Lite, twin circular flash tubes, and separate Controller Unit
Flash Control System:
Control in E-TTL Mode: FP Sync, FE lock, Flash +/- compensation, Flash Exposure Bracketing
Control in Manual Mode: Flash +/- compensation
Ratio Control in Manual: L:R tubes (A:B); 8:1 - 1:1 - 1:8 in 1/2-stop increments
Custom Functions: Twelve (in addition to any on camera), set on flash LCD; three Personal Functions
External Power Source: Compact Battery Pack CP-E4
Guide Number: 45.93' (14 m) ISO100
34.45' (10.5 m) ISO100
Recycling Time: Approximately 0.1 - 5.5 seconds
Power Source: 4 AA batteries in Controller (Alkaline, NiCd, Lithium and Ni-MH type AAs are OK)
Specifications: Commander FunctionYes Remote FunctionYes Guide Number28m/92ft. (at ISO 100, 35mm zoom head position, in FX format, standard illumination pattern, 20?C/68?F) to 39m/128ft. (at ISO 200, 35mm zoom head position, in FX format, standard illumination pattern, 20?C/68?F) Electronic ConstructionAutomatic Insulated Gate Bipolar Transistor (IGBT) and series circuitry Flash Exposure Controli-TTL Balanced
Compatibility: Compatible with the following Canon digital cameras including: EOS 60D EOS 70D EOS 80D EOS 1D X EOS 1D X Mark II EOS 5D Mark II EOS 5D Mark III EOS 5D Mark IV EOS 5Ds EOS 5Ds R EOS 6D EOS 7D EOS 7D Mark II EOS Rebel SL1