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 flashes.