Lens Construction12 elements in 9 groups (2 aspherical lenses , 1 UHR lens)Nano Surface Coating-MountMicro Four Thirds mountOptical Image StabilizerYes (MEGA O.I.S.)Focal Lengthf=45-150mm (35mm camera equivalent 90-300mm)Aperture Type7 diaphragm blades / Circular aperture diaphragmMaximum ApertureF4.0(Wide) - F5.6(TELE)Minimum ApertureF22Closest Focusing Distance0.9m / 3.0ftMaximum magnificationApprox. 0.17x / 0.35x (35mm camera equivalent)