Overview

The Carl Zeiss Jena Sonnar 135mm f/4 is a vintage lens praised for its color rendering and resolving power, with a near-perfect balance of sharpness and soft bokeh, avoiding abrasive polygons despite six aperture blades. It is compact, all-metal, and focuses down to under 1m, offering smooth focusing and subtle aperture clicks. However, a stiff focus ring can hinder precise focusing in demanding situations. It suits photographers who value character and are willing to work with manual focus, particularly on adaptable M42 mounts.