What is the sharpest lens you own?

the best lens i have ever owned is zeiss 100mm f2.0 makro, and my 300mm f2.8 IS mkII comes very very close 2nd! zeiss 100mm f2.0 makro is so good in every aspect that i don't think there is any other lens that can match it, period. you'd only know what i am talking about when you use one for portrait. my tse 17mm/24mm both deserve honorable mentions as well. i don't think i have a canon "L" prime or tele zoom that i have 2nd thoughts about their performance, and i do own quite a few of them

cheerz.