Mods, if this is the wrong place for this thread, I apologize and please move it where it should be. So I often read advice for sharpening that involves "buy a loupe so you can see the edge" or some variety thereof. I was hoping to get some community input on that. 1) What power(s) are good to see what you need to see on the edge? 2) Good brands/examples of loupes, and good places to purchase them at decent prices. 3) Alternatives to a loupe with equivalent functionality.