The Opteka EF-790 DG SUPER TTL is designed to work with the all Canon EOS digital SLR cameras, It has a maximum guide number of 148 feet or 45 meter at 85mm focal length (ISO 100).The projection angle of the flashgun is set automatically to match the len's focal length ranging from 24mm wide angle to 85mm medium telephoto. It also incorporates a built-in reflecting plate and diffuser that can be slid out from the top of the flash head for soft lighting effects. The bounce flash head can be tilted 90Deg upwards and can be swiveled 180Deg to the left and 90Deg to the right. In addition, the flash can also be set manually at 6 different power output levels or can be utilized as a wireless slave.

Features
Bounce & swivel head - Flash can be tilted 90Deg upwards and also can be swiveled 180Deg to the left and 90Deg to the right
AF assist - Autofocus auxiliary lamp helps the camera to focus in low-light
Illuminated LCD panel
Built in Reflecting Plate and Diffuser
Front and Rear Curtain Synchronization
Battery-saving mode shuts down power after 5 minutes
1 Year Warranty

Specifications
Type: Shoe Mount
Guide No: 148' (45 m) at 85mm
AF Illuminator: 3.3ft-20ft/1-6m (50mm Lens)
Flash Duration: 1/1000 to 1/20,000 second
E-TTL II Dedication: Yes
Bounce Head: Yes
Swivel Head: Yes
Recycle Time: 0.5-9 seconds (based on fresh batteries & full power)
Power Source: Four rechargeable ""AA"" batteries (Lithium, Ni-cd & Ni-MH)
Dimensions: 72mm x 100mm x 125mm
Weight: 270g (without batteries )