Overview

The Voigtländer Color-Skoparex AR 21mm f/4 is an ultra-compact, all-metal lens praised for its excellent build quality and smooth focus ring. It is very sharp wide open, comparable to the Zeiss 21mm Biogon, but half the size and with a 39mm filter thread. Its modest f/4 aperture is a limitation, though many users stop down for landscapes or street photography. The lens flares heavily when shooting into the sun and requires an external viewfinder on Leica M cameras. It suits photographers prioritizing portability and sharpness over speed.