Sigma EF-500 DG ST TTL

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Sigma Electronic Flash EF500 DG ST for AF 35mm and Digital SLR cameras has a maximum guide number of 165 in feet or 50 in meter at 105mm focal length (ISO 100).
This Sigma camera flash is designed to work with Nikon film and digital SLR systems such as Nikon D50, D70s, D70, D100, D2x, D2h, D1x, D1h, D1, F6, F5, F100, N80/F80, N75/F75 etc.
Sigma EF500 ST DG for Nikon is also dedicated for external flash use with Nikon Coolpix 8800, Coolpix 8700, Coolpix 5400, Coolpix 5700 and Coolpix 5000 advanced digital cameras.
Projection angle is set automatically to match this Sigma flash to lens focal lengths ranging from 28mm wide-angle to 105mm medium-telephoto.
Sigma EF500 DG ST incorporates a wide panel that expands the angle of illumination that of a 17mm focal length lens.