Finally, a powerful enough TTL speedlight in a matching size for Sony A7r (and all newer Sony's). The Canon version should be great for some of the smaller bodies or EOS M series.
EOSE2892 by drjlo1, on Flickr
5DIII vs. A7r by drjlo1, on Flickr
EOSE2892 by drjlo1, on Flickr
5DIII vs. A7r by drjlo1, on Flickr