The Lumix G Vario PZ 45-175mm f/4,5-5,6 ASPH. Power O.I.S. telephoto zoom lens, Multi-Actuator Floating Inner Focus System - Controls 3 lens groups separately - Driven by a stepping motor Outstanding compactness (approx. 90 mm length) Superb image rendering for lifelike textures and crisp, edge to edge contrast Lens constructed of 14 elements in 10 groups - 2 aspherical lenses - 2 ED lenses Nano Surface Coating technology minimizes reflection through the entire visual light range (380 nm to 780 nm) POWER O.I.S. – Advanced Lumix technology F=45 to 175 mm (35 mm equivalent: 90 to 350 mm) Light Speed AF (shortened shutter time lag) Circular aperture diaphragm Durable metal mount