The APO-Summicron-M 50mm f/2 ASPH. Lens fromLeica combines a traditional normal focal length with a meticulously engineered optical design, making it a fast standard prime lens recognized for its apochromatic capabilities. By incorporating anomalous partial dispersion and high refractive index glass elements, this lens effectively aligns red, green, and blue wavelengths on a single plane, significantly reducing chromatic aberrations. Additionally, it includes one aspherical element to minimize spherical aberrations, while a floating element ensures clarity and sharpness across the entire focusing range from 2.3 feet to infinity. This compact 50mm lens is particularly noted for its small size, rendering it an excellent choice for everyday photography. As with all M-mount lenses, this 50mm f/2 features a manual focus mechanism and is equipped with a practical focusing tab for enhanced control during operation.

• Apochromatic design employs three elements made from anomalous partial color dispersion glass, as well as two high refractive index elements, in order to suppress chromatic aberrations throughout the aperture range for increased color accuracy and clarity.
• One aspherical element reduces spherical aberrations for improved sharpness from edge to edge.
• A floating element is used to maintain clarity and sharpness throughout the focusing range, from 2.3′ to infinity.
• In addition to the apochromatic designation, this lens also pairs a Gaussian type optical construction in front of the aperture along with a design resembling the Summilux-M 50mm f/1.4 behind the aperture, in order to significantly reduce distortion while also increasing overall sharpness and consistent illumination.
• Bright f/2 maximum aperture benefits working in difficult lighting conditions and also affords greater control over depth of field.
• Compact overall design is ideal for use in everyday shooting situations.
• Manual focus design provides a minimum focusing distance of 2.3′ with a maximum magnification ratio of 1:11.3.
• Built-in extendable lens hood shades and protects the front element to reduce lens flare and ghosting. Additionally, the front of the lens is threaded to accept 39mm screw-in filters.