He is using a Sony A7r which is a Fullframe mirrorless interchangeable lens camera.
Actually it doesn't matter what camera you are using. As long as you know how to use it well.
http://www.flickr.com/photos/tiew_cy/sets/72157634258630564/
I used OMD EM5 for this set - which I took in Japan. OMD EM5 shared the same sensor as the EPL6 that you are using, so the IQ should be similar.
Of course I am not saying that I am an expert or what, but as long as you know what you are doing, you should be able to get acceptable photos.
i am still exploring my Camera EPL6. by the way anyone here know how to adjust the live bulb setting.