The Sigma 530ST DG ST S-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 S-TTL 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