Leica R system

Leica R interchangeable lenses are finely tuned with respect to focal length and aperture, and combine high resolving power with high image contrast to provide exceptional picture sharpness. The wide range of lenses begins with the Fisheye to the Vario, from a 15mm wide-angle to a 800mm tele photo lens. Carefully matched anti-reflection coatings on highly refractive glasses assure almost 100% light transmission within the entire visible spectrum. The additional ultraviolet light is further absorbed by means of Absorban cement layers. This also assures that all lenses maintain the same color transmission, regardless of focal length. The optical systems is matched so as to render colors true to the original. Even at full aperture, the residual aberrations of the Leica R lenses are corrected so well that in practice they do not affect the performance. The lenses may be used at full aperture - for all Leica R lenses - it constitues a fully effective working aperture.