Compact, powerful and very easy to use. It pairs perfectly with my OM-D E-M10 Mark II and seems to work well in TTL metering mode so far. I also tested our RC (remote) mode using my E-M10 II's built-in flash as a trigger and this function worked well too. The LED light has 3 levels of brightness and is useful for fairly close objects, but I doubt how often I'll use it. The LED is also used for the AF assist light, which I'm not keen on (I prefer the red lights on my Canon flashes as they're less distracting to those I'm shooting). It feels like a technological step backwards, as I'm used to Canon's RT system with large LCD menus, but it's on par with the latest generation of Canon flashes in terms of menu customization (580EX II etc.). I'm sure Olympus will eventually update their lineup with a more modern user interface.
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