Im super excited! I picked one of these on Monday and got a chance to play with it a bit yesterday. I knew this lens would be difficult but had no idea how difficult. I definitely need a better flash system for anything above 3x magnification. I tried my very first stacked images but they didn't turn out so hot. This was the only decent shot I was able to get so far. Obviously not stacked. This was 3x at f/16. Does anyone else have experience with this lens that can offer some helpful tips?