Panasonic Leica DG Vario-Summilux 25-50mm f/1.7 ASPH. LensVersatility within a short telephoto range, the Leica DG Vario Summilux 25 50mm f 1. 7 ASPH., from Panasonic, is a 50 100mm equivalent zoom for Micro Four Thirds mirrorless cameras. Ideal for portraiture, fashion, events, and other mid range subjects, this lens pairs the useful focal length range with an impressively bright constant f 1. 7 maximum aperture, advanced optics, and a portable form factor. Normal to short tele zoom is designed for Micro