The Voigtländer Color-Skopar 21/3.5 VM and Ultron 35/2 VM lenses are affordable choices for Leica M Mount. This review discusses their quality in both optical and mechanical terms
Leica released two lenses for M Mount with a variable focal length. One other did not make it past prototype stage. This article reviews the Tri-Elmar 16-18-21 and the Tri-Elmar 28-35-50 in practical use on M rangefinder cameras.
Another new compact lens for L-mount: The Sigma 20mm F2 DG DN | Contemporary is a high-performance wide-angle optic in a lightweight, all-metal body...