Specifications -Supported cameras Interchangeable lens format cameras with multi accessory portsGuide Number 8.5m/27.9ft. (at ISO 100, 20 C/68 F) to 12m/39.4ft. (at ISO 200, 20 C/68 F)Electronic Construction Automatic Insulated Gate Bipolar Transistor (IGBT) and series circuitryFlash Exposure Control Options available using camera controls - Flash mode - Fill flash (Front-curtain sync); Front-curtain Slow-sync; Rear-curtain sync; Rear-curtain Slow-sync; Flash compensation