Overview

The Olympus 12-40mm F2.8 Pro is a sharp, well-built standard zoom for Micro Four Thirds. Optical strengths include excellent center sharpness wide open and throughout the zoom range, with well-controlled distortion and vignetting. Weaknesses include visible lateral chromatic aberration, especially at wide angles. Build quality is stellar, with weather sealing and a manual focus clutch (MingThein). The lens is larger and heavier than some alternatives (MingThein). It suits professionals and enthusiasts needing a rugged, versatile zoom for demanding conditions.