Overview

The Carl Zeiss Sonnar 210mm f/4 C645 is a telephoto lens praised for sharpness, contrast, and color. It produces smooth bokeh and works well with a 1.4x extender, though purple fringing may appear on edges. Build is solid but the lens is long and lacks a tripod collar, causing front-heavy handling. It suits users seeking excellent image quality for close-ups and portraits, especially on Contax 645 or adapted to Leica S.