I use the Phase One (Schneider) Macro MF 120mm and love it. It's extremely sharp and stands up to the high resolution capabilities of my IQ3 100 just fine. It's the only non-LS lens I have but since I exclusively use it for art reproduction, I don't need the high synch speed of the LS lenses. Before I bought, I compared images from the SK macro 120 LS to this non-LS and it's every bit as sharp and distortion free as the newer LS and for a lot less cost. Since I focus in live-view, the manual (only) focus is not an issue, although even without live-view, I'd use manual focus for art work.