Balancing historical reference with modern optical performance, the Color-Skopar 21mm f/3.5 Aspherical from Voigtlander is an ultra-wide prime designed for Leica M-mount rangefinder cameras. The broad field of view is complemented by the inclusion of one aspherical element, which controls distortion and spherical aberrations in order to achieve accurate rendering and high sharpness throughout the aperture range. Its f/3.5 maximum aperture also contributes to a sleek and lightweight form factor, making it an ideal walk-around lens for everyday shooting. Additionally, its manual focus design permits working with subjects as close as 1.6' away, and the 10-blade diaphragm contributes to a pleasing bokeh quality.