Top critical review
Reasonable, but not great.
on 13 April 2015
It does work as you'd expect it, creating much softer shadows and more even lighting. However it drops roughly 60% of the power normally provided by the flash so it's only good for very close distances, I'd say up to 2 metres.
Also the lack of any mount for the front element means you'll need to constantly hold it with your hand which gets in the way of operating the lens itself. Otherwise you're either break your flash or aim at the floor.