Very nice work. I have had much the same experience as you with your macro hunting adventures. It is really quite fascinating because you inevitably end up seeing things that you would never see without the help of your camera. I took this with my first digital camera Sony DSC-F505V, and I had a Contax 50mm f1.4 reverse attached to the end. I've found depth of field and proper focusing to be very challenging, but as you say, hours pass very quickly. These are dung flies found in my back yard.