Fallkniven F1's are
supposed to be full convex, but I'm yet to come across one fresh from the factory that is. They all seem to be convexed nicely for about 2/3 to 3/4 of the way back from the edge, where they have a little hollow in them before thickening again to the spine. The hollow is shallow. I mean
really shallow .. but a truly flat hone will show you where it is if you try sharpening an F1 over the whole of the bevel (as you should with a full convex
)
The steel in them is good, and the heat treat is, as far as I have seen, impeccable. They take a great edge if sharpened properly, and keep it well too. I'd never go shooting, fishing, or for a bimble in the woods without one in my bag in the days before I made my own knives.