[Brightcolours]

Yep, a big question mark with Sony's Nex and it's registration distance, I'm not sure if my Pentax K3 doesn't use the same sensor, (similar if not)  but with it's 43mm approx. reg distance it has no problems with sharp corners and borders, in fact quite the contrary.

 

That can't be right, as Canon has a flange distance of 44mm. I looked it up and behold, Pentax' flange distance is 45.46mm (same as M42) B)