B0009E1XG2 Sigma Electronic Flash EF-500 DG ST for Minolta SLR Cameras

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Light Projection Angle is automatically set to match the lens between 28mm and 105mm
Also covers 17mm wide angle when the built-in diffuser is deployed
Red LED AF Auxiliary lamp
Guide Number – 165 in feet / 50 in meters 105mm (ISO 100)
Charge Time – Approx. 6 seconds w/alkaline batteries; Approx. 4 seconds w/NiMH batteries