Thanks guys, for responding so quickly. (And for even calling Don 🙂 )
I guess I’ll have to live with the fact that my knife is too thick for exact results with the goniometer. Depending on how I hold the knife exactly, the light pattern is quite different: just a tiny bit of a degree already makes a world of difference. And there must be some unevenness in the knife, because the patch of light on the right (around 15 degrees) is consistently larger than the patch of light on the left (around 9 degrees).
You are probably right that these large patches of light are just reflections from anywhere on the blade. I was puzzled for some time, thinking: “a convex edge varying from 10 degrees till 28 degrees, that cannot be rightâ€. But now I come to think of it, the 28 degrees (in the photograph 22 and 31 degrees, but twice 28 when I slightly twist the knife) must be the dullest angle of the edge. And since it is convex, that must be the final angle of the edge of the blade. Does this make sense?
I also mailed Fallkniven with the question what the angle is of the final edge. They answer quite nicely every time. But the mail exchange is getting sillier and sillier. I ask them the angle and they respond with more and more detailed explanations on how to sharpen a convex edge :-). They are really worried I am going to end their beautiful convex edge with a guided sharpening system :-).
