What's the sharpest / zero distortion / zero aberration macro lens money can buy. I had a look at Zeiss options like the Zeiss Makro-Planar 100mm F2 but that also had aberration. I plan to use whatever the lens will be in a controlled environment. So as long as it's clinically sharp, has great dynamic range, no distortion and aberration, I'd like to know about it regardless of budget or what brand it is. Thanks.