Thanks and yes as you know m4/3 lens are reliant on their small size because the distortion correction is done in software rather than camera lens design. I aught to have done better here as if you get the 12mm wrong it shows.
Dont get me wrong I saw a demo of and Olympian man with colour and tie bathing the E-M5 under a glass of water. I though still hesitate, for no rational reasoning.