Sigma EF-610 DG ST
$165/£130/24-105mm auto zoom/Optical slave & AF assist.
Sigma is better known for there range of lenses, but it also produces a decent lie in flashguns too, with the EF-610DG ST available for Sigma, Canon, Nikon, Pentax and Sony systems. It’s the largest flashgun tipping the scale at 320g, and has the look and feel of a durable piece of kit. it has a bounce and swivel head, but two separate buttons operate these, which can be a little annoying. Thee built-on wide-angle diffuser and reflecting plate are great additions, and the minimal controls on the back makes this an intuitive model to use. Out of the box, you also get a hotshoe stand and a protective bag. As with all models here this flashgun has plastic feet, which isn’t a problem in terms of operation, but after putting on and removing your flashgun over long period of time these will wear and could cause issues. With both TTL and manual features, you have the ability, via your camera, to have more control over the flash output. There is a zoom range of 24-105mm, which automatically sets the optimum illumination angle in accordance with the lens’ focal length, and a manufacturer stated guide number of 61- the longest produced by Sigma to date. Clocking the guide number at 45, a good deal less than 61 but an indication nevertheless of the powerful output of the flashgun. A good flashgun for a wedding photographer.