I have a new macro lens. I have yet to figure out how to use it. I took this photo in broad daylight. That is a rust covered silver diary key. I found it on the ground and placed it on the hood of my gold car for this shot. Why is it so dark? Why is there no color? Why is there no focus? Yes, my light meter and f-stop were set for the conditions at hand — unless the lens itself changes those factors. If so, how?