The EF-530 Super DG is Sigmas flagship TTL flash and has been updated with improved coverage range and a stronger power output. It features a powerful Guide Number of 174 feet at 105mm and covers a focal range from 24mm to 105mm Type: Shoe Mount Bounce and Swivel head: Flash can be tilted 90 degrees upwards and 7 degrees downward for close ups. Also can be swiveled 180 degrees to the left and 90 degrees to the right Zoom head: 24-105mm autozoom (flash senses focal length and adjusts) AF assist: Autofocus auxiliary lamp helps the camera to focus in low light situations Display: Features an illuminated LCD panel Strobe effect: The multi pulse features enable reduced power setting from 1/4 to 1/128 in 6 steps and the pulse frequency of the flash can be set from 1Hz to 199Hz High speed sync and wireless i-TTL features are supported when used with applicable cameras Slave flash: Allows the flash to be triggered by the cameras built-in flash or another flash Modeling Flash mode to provide proper light distribution to check the shadow of the subject Auto power off: Battery saving mode shuts down power after 90 seconds Power source: 4 (four) 1.5 volt AA batteries (alkaline, lithium, NiCad or NiMH) Guide No.: 92 feet at 24mm, 132 feet at 50mm or 174 feet at 105mm Angle of coverage: 84 to 23 degrees (24-105mm lenses in 35mm format), 103 degrees (17mm with Wide Panel supplied) Variable power: 1/1, 1/2, 1/4th, 1/8th, 1/16th, 1/32nd, 1/64th and 1/128th i-TTL dedication Compatibility: for Nikon with i-TTL Fully compatible with the latest digital SLR cameras that use a pre flash and supports full i-TTL operation (where supported by camera) The perfect all around flash for any digital or 35mm autofocus SLR shooter Dimensions: inches 3.0 wide x 5.5 high x 4.6 deep Weight: 11.8 ounces

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