Opteka EF-710 DG Super i-TTL Autofocus Dedicated Flash for Nikon D7000, D5100, D5000, D3200, D3100, D3000, D800, D700, D300s, D300, D3X and D3S Digital SLR Cameras
TheOpteka EF-710 DG SUPER i-TTLis designed to work with the all Nikon digital SLR cameras, It has a maximum guide number of 72 feet or 22 meters at 35mm focal length (ISO 100). The EF-710 DG is an ideal flash unit for beginners in digital SLR photography, but it is also useful for hobbyists and professionals looking for a handy i-TTL flash unit offering an effortless bounce flash function. The bounce head can be tilted in 5 steps - horizontal, as well as 45, 60, 75 and 90 degrees.Features~ Bounce head - Flash can be tilted in 5 steps - horizontal, as well as 45, 60, 75 and 90 degrees~ AF assist - LED light beam helps the camera to focus in low-light~ Automatic shutter speed setting~ Flash readiness indicator~ Front and Rear Curtain Synchronization~ Battery-saving mode shuts down power after 5 minutes~ 1 Year WarrantySpecificationsType:Shoe MountGuide No:72' (22 m) at 35mmAF Illuminator:3.3ft-20ft/1-6m (50mm Lens)Flash Duration:1/2000 to 1/40,000 secondi-TTL Dedication:YesBounce Head:YesRecycle Time:0.3-10 seconds (based on fresh batteries & full power)Power Source:Two 1.5-Volt "AA" batteries (alkaline, lithium, Ni-cd & Ni-MH)Dimensions:65mm  x 54mm x 98mmWeight:127g (without batteries )