The Sigma EF- 500 DG ST is the flashgun for those who think size matters. It has the largest dimensions on test and is sure to get users noticed when they're out and about. The budget price is matched by the plastic feel and lack of LCD display or ...

Cheap

Poor performance

This flashgun punches above its weight (or price tag) registering just over f/8 at maximum power. However, users might have to accept a bit of colour shift from the highest and lowest power settings as it produced a cool 6500K reading at maximum power ...