I've not shot test charts, but I have three samples of the 55mm f/3.5 Micro-Nikkor. One is AI, one is non-AI, and one is AI-converted compensating aperture. All of them outperform the 55mm f/2.8s I have at macro distances. The f/2.8 is better at infinity, but the f/3.5s are consistently better in macro applications. The f/2.8, like every other floating element lens I've ever tested, falls apart when you start adding extension tubes beyond the companion 25mm one, and especially reversed or on bellows. On the 105mm front, I have a 105mm f/4 which is okay. My AF 105mm f/2.8D is a really, really good lens out to 1:1-not as good as the 55mm f/3.5-but really good. I find it better than the 105mm f/2.8 VR, which I had and sold.