Overview

The Carl Zeiss Jena Tessar 40mm f/4.5 is a compact, all-metal lens from the late 1940s/early 1950s, built as a stop-gap wide-angle for early SLRs. Its 4-element Tessar design delivers sharp center performance but weak corners and mediocre blur smoothness. Handling is basic: no preset aperture ring, requiring manual stop-down. Build quality is good, with deep-set front element negating hoods; some versions have delicate multicoating. It suits vintage enthusiasts seeking a cheap, rare lens with classic Tessar character, but its odd 40mm focal length and optical compromises limit broader appeal (Fuji X Forum user notes sharpness and nice colors).