Sigma EF-500 DG ST
Announced 2004


Electronic Flash EF-500 DG ST
Fully automatic flash photography for the latest Digital SLR cameras with a new design.

Designed to work with the new TTL system of all the popular manufacturers.

Ease of use and powerful flash output

・   Featuring a guide number of 50m (165/ft) w/ISO 100.
・   When the built-in Wide Angle Diffuser Panel is used, the flash can cover an angle of up to 17mm.
・   Autozoom head function for changing the angle of illumination

Electronic Flash EF-500 DG ST can be used with Sigma’s and other manufactures’ AF 35mm SLR cameras and Digital SLR cameras. It features TTL automatic flash exposure control for easy operation.

It has a maximum guide number of 50/m (165/ft) w/ISO100. Projection angle of the flashlight is set automatically to match the lens’ focal length ranging from 28mm wide-angle to 105mm medium-telephoto. It incorporates a built-in diffuser that widens the angle of illumination to 17mm. The `gun enables full automatic flash photography by TTL automatic flash exposure control. In addition, manual flash can be set to full and 1/16 output levels in 2 steps.
For bounce flash it can be tilted 90° upwards and 7° downward for close-ups. It can also be swiveled 180° to the left and 90° to the right. Covering focal length of the flashlight can be seen on the LED panel and the flash ready signal can be seen in the viewfinder. The EF-500 DG ST incorporates an auto power off system.

All models feature a new cosmetic finish and the Nikon version incorporates the unique iTTL exposure control (fully dedicated to the Nikon D-70 digital SLR).

Fittings: Sigma SA-STTL, Canon EO-STTL, Minolta MA-MADI, Nikon NA-ITTL and Pentax PA-PTTL

Construction 18 Elements in 16 Groups
Focal Length 300-800mm
Maximum Aperture ƒ5.6
Minimum Aperture ƒ32
Field of View 8.2-3.1°
Minimum Focus Distance 600cm
Number of blades 9
Maximum Magnification 1:6.9
Zooming System N/A
Filter Size 46mm Rear
Diameter 165.5mm
Length 541.5mm
Weight 6Kg
SRP at launch: N/A
Available Mounts: Sigma, Canon, Nikon (D)