Overview

The Leica APO-Summicron-M 90mm f/2 ASPH is widely praised for exceptional sharpness even wide open and across the frame, with no visible distortion and smooth bokeh. Its apochromatic design delivers high contrast and micro-detail. Weaknesses include heavy weight (475g) and front-heavy balance on M bodies, plus some coma at f/2 with bright lights. Build is all-metal and flawless, with a smooth slide-out hood and ergonomic ring placement. It suits photographers needing top optical performance for landscapes or portraits, but its size and long focus throw may deter those preferring lighter, quicker lenses.