The Leica 75mm lens at BHphoto.
Reddotforum reviewed the Leica APO-Summicron-SL 75mm f/2 ASPH lens:
If the 75 SL is any indication of what’s to come, the SL lens line might very well set the standard for the very best in optics from Leica. Fine details are resolved with precision. Out of focus rendering is silky smooth with cinematic bokeh. Contrast and color are spot on. Challenging lighting is readily handled. Distortion, color aberrations vignetting are nowhere to be found.
And, while I didn’t have a chance to test the 90 APO SL yet, just judging from the MTF charts, the 75’s slightly longer sibling appears to be slightly superior in the sharpness department, but at this point, we’re splitting hairs. Both lenses are truly reference class, and class-leading at that. Besides their stellar imaging capability, the new line of Summicron SL lenses finally come in a size that SL users have been clamoring for.