Unless you’re extremely loyal to your camera body’s brand, there’s no reason to opt for an OEM Speedlight/Speedlite by default; there are great options available that make major manufacturers’ price markups on these devices highly apparent. Take, for example, the Phottix Mitros+, a TTL unit available for Canon (and soon Nikon) with most of the bells and whistles of those brands’ flagship flashes. The unit has built-in radio triggering and acts as a slave or commander, meaning it can be fired remotely via a hotshoe-mounted Mitros+ or a compatible Phottix flash trigger. Since it uses radio triggering, the flash can be placed out of line-of-sight, in a corner or another room, say, and used over a greater distance than possible with standard optical triggers, even in full sunlight. A 3.5mm port is provided for standard triggering, a tilt-swivel head has 24-105mm coverage and the unit is rated for a guide number of 58 meters.