Summary: The Olympus Zuiko Digital 12-60mm is quite simply one of the best quality zoom lenses we’ve tested to date. Its optical performance is superb, delivering very sharp results across the frame at all focal lengths. The SWD auto-focusing is very quick and quiet, and unlike the motor-assisted manual focusing of most Four Thirds lenses, the mechanically-linked system here feels tactile and responsive.
Pros: Flexible 5x general purpose range., Quick and quiet SWD focusing., Excellent build quality. Dust and splash-proof., Very sharp results across frame and focal range.
Cons: Shadow from popup flash on smaller bodies., Feels front-heavy on E-4xx series., No anti-shake on non-stabilised bodies., Imager AF not supported in Live View.
Summary: Overall this lens performs very well indeed. In terms of resolution, control of chromatic aberrations, focusing speed and the build quality it is an excellent lens. The barrel distortion at 12mm may be an issue for some, but this is generally to be expected with a high zoom ratio like this.
Pros: Excellent build quality, Good optical performance, Fast focusing, Useful minimum focus distance