The Opteka EF-600 DG SUPER ETTL-II is designed to work with both the newest Canon EOS Digital SLR cameras, for advanced flash photography. 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 lens' 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 90° upwards and can be swiveled 180° to the left and 90° 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.

Bounce & swivel head
Flash can be tilted 90° upwards. Also can be swiveled 180° to the left and 90° to the right
AF Assist
Autofocus auxiliary lamp helps the camera to focus in low-light
LCD Display
Features an Illuminated LCD panel
Built in Reflecting Plate and Diffuser
Reduce strong light to create soft lighting effects
Front and Rear Curtain Synchronization
Useful at slow shutter speeds to give a realistic impression of movement.
Auto Power Off
Battery-saving mode shuts down power after 5 minutes

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
TTL Dedication: Yes
Bounce Head: Yes
Swivel Head: Yes
Recycle Time: 0.5-9 seconds (based on fresh alkaline batteries & full power).
Power Source: Four 1.5-Volt "AA" batteries (alkaline, lithium, Ni-cd & Ni-MH).
Dimensions: 72.0 x 100.0 x 125mm WxHxD
Weight: 270g (without batteries)