The Leica Summarit-S 70mm f/2.5 ASPH Lens is a high performance, standard focal length optic built exclusively for the Leica S Digital Camera System. Designed for professional applications, the lens guarantees outstanding color and contrast at all apertures and distances as close as 1.6' (0.5m). Highly refractive glass with anomalous partial dispersion provides image sharpness from edge to edge and a built-in front filter with environmental sealing protects the optic under harsh shooting conditions