I was hoping that someone who has tried the new Panasonic 20mm mkII could tell me if the focus mechanism is now internal? I am seeing conflicting reports on the net. On the original version the front element moves in and out as the lens focuses. This means that adding any hoods / converters / filters added to the weight/strain on the focus mechanism. It also makes damage from impact more likely. It would be a nice (all be it small) upgrade over the original.