Ideal for wide angle and super zoomed shots alike the sigma ef 630 flashgun is compatible with lenses of 24 200mm focal length and has a built in wide panel to cover an angle of up to 17mm it features an intuitive user interface and dial settings controls and has amongst other highlights ttl exposure control high speed sync wireless flash functions auto zoom and bounce flash functions as with all sigma products the sigma ef 630 flashgun can be updated via the sigma usb dock for flash