Thanks for your thoughts, Chuck. Ideally, I'd like everything in focus and sharp, but I prefer to sacrifice DOF for improved sharpness, i.e, lack of motion blur. Yes, when focusing I aim for the insect's eye, but butterflies move quickly, so it's pretty much luck as to what gets in focus. FWIW: these were taken with a Canon 100mm macro @f8.0 with an extension tube.