I love the 100mm Macro lens. I can't believe it catches the inclusions in the stone as well as it does. I think I could have used just a little more DoF, but I want the ring shank out of focus. Does the back prong being slighty blurry bother you? I think this is my best diamond shot so far. #2 I am thinking of using this for a postcard, with logo and text to the left. #3 Too much shadow?