The Sigma 530ST DG ST TTL Shoe Mount Flash is Sigma's economical full-TTL flash, and has been updated with improved coverage range and a stronger power output. It features a powerful Guide Number of 174'/53 m at 105mm, and covers a focal range from 24mm to 105mm. This flash provides full TTL operation with digital SLR cameras, including full ADI operation with applicable cameras.
Just as with many of Sigma's products, you will find features on the 530-ST that normally would only be associated with much more expensive flashes. The perfect economical all-around flash for any digital or 35mm autofocus SLR shooter.
Bounce & Swivel Head
Flash can be tilted 90° upwards and 7° downward for close-ups. 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 situations
Auto Power Off
Battery-saving mode shuts down power after 90 seconds