Wow!! Those are some amazing pictures. It's difficult to get that kind of sharpness without a tripod. Good job. That seems to be an excellent lens. I have an 85 mm Nikkor macro lens and I love it. If I had any experience before buying my lens, I might have gone to the 105 mm macro. It's so much easier to get good photos when you can stand back at a reasonable distance. It also means that you're far enough back that you don't block the available light.