The Leitz 75mm f/1.4mm Summilux-M (Used, A condition) is a fast lens with unique capabilities. The flare-free and unexcelled subtleties of its color rendition are the result of a meticulous optical computation and unique optical glass. No coma can be discerned in the image area, even at wide-open aperture. Systemic vignetting is remarkably low for a lens of this speed, and distortion is practically undetectable. Its high speed of f/1.4 is ideal for available light photography, especially for natural portraits and for reportage. This lens proves its brilliance especially in difficult, high-contrast situations, such as at concerts or stage performances.
This is the magnifying factor of a lens. Macro lenses will often be described by their “magnification factor”. A lens with a 1:1 magnification factor produces a projected image on the sensor which is the same as the subject.
The individual pieces of glass that form the overall optical construction. Most lenses have between four and eleven elements to bend the light rays to ensure a perfectly formed image appears on the light sensitive surface, such as a film or CCD. The elements are arranged in groups and may be seen in specification sheets as, for example, 6 elements in 4 groups. That configuration may have two single elements and the other four grouped in pairs.