Overview

The Carl Zeiss Biogon T* 2/35 ZM is a modern 35mm f/2 lens for M-mount rangefinders, offering excellent optical performance with sharpness comparable to Leica's Summicron ASPH and less distortion. Its 9-element design yields high contrast and resolution, but it is larger than competitors and partially blocks the viewfinder. Build quality is decent but not premium; the black paint may wear prematurely and focus ring play can develop. A notable drawback is the uncommon 43mm filter thread, complicating system integration. It suits photographers prioritizing optical quality over compactness and who can accept its handling quirks.