I purchased a K1 ext ring a while ago and, having just gotten around to playing with it, I notice that when a lens is mounted on the camera the lens is rotated about 45 degrees too far clockwise (facing the camera). I can get around this to some extent by removing the stop screw and rotating the lens so that it is upside down, however, this is not terribly convenient. (The lens wobbles slightly when positioned correctly with the stop screw removed, hence the need to position it upside down) The 45 deg rotation is not noticeable unless the focal length is very short and the lens has a built-in lens hood, e.g. the 16mm f/2.8 FX fisheye. Any conjectures on why the unusual mount geometry?