Panasonic Leica DG Nocticron 42.5mm f/1.2 ASPH. POWER O.I.S. LensCharacterized by its fast and sophisticated optical design, the Leica DG Nocticron 42. 5mm f 1. 2 ASPH. POWER O. I. S. from Panasonic is an 85mm equivalent prime for Micro Four Thirds mirrorless cameras. The fast f 1. 2 maximum aperture benefits working in difficult lighting conditions and also affords more control over focus position for producing shallow depth of field imagery. The lens's optical design employs a pair of aspherical elements, one UHR