Lens Construction15 elements in 10 groups (1 aspherical ED lens, 3 aspherical lenses, 2 ED lenses, 1 UHR lens) Nano Surface CoatingYes MountMicro Four Thirds mount Optical Image StabilizerNo Focal Lengthf=8-18mm (35mm camera equivalent 16-36mm) Aperture Type7 diaphragm blades / Circular aperture diaphragm Maximum ApertureF2.8 (Wide) - F4.0 (Tele) Minimum ApertureF22 Closest Focusing Distance0.23m / 0.75ft Maximum MagnificationApprox. 0.12x / 0.24x (35mm camera equivalent) Diagonal Angle of View107°(Wide) - 62°(Tele) WeatherproofSplash/Dust/Freezeproof Filter Sizeφ67mm Max. Diameterφ73.4mm / 2.89inch Overall LengthApprox. 88mm / 3.46inch (from the tip of the lens to the base side of the lens mount) WeightApprox. 315g / 11.1oz (excluding lens cap, lens rear cap and lens hood) Standard AccessoriesLens cap, Lens rear cap, Lens hood, Lens storage bag