Zeiss Makro-Planar T* F2 100mm ZE - £1,550
Despite a slight dip in the corners at f/2.2, the Zeiss records razor-sharp images that are consistently sharp throughout the frame.
As well as being the sharpest lens on test, it's also the most adept at keeping fringing down to a minimum, with only minor traces.
Lab tests show slight distortion, but certainly not enough to require any kind of software-based correction.
Image test verdict
This is a cracking lens, sharp and consistent throughout its range. There's also very little distortion and chromatic aberration.