The Zuiko Digital 14-42mm 1:3.5-5.6 ED is the standard kit lens which Olympus supply with their lower-tier DSLRs, including the E-420 and E-510. Announced in September 2006 to accompany the launch of the E-400, it shares that camera's defining characteristic, being remarkably compact in size. Indeed it takes advantage of the relatively small size of the Four Thirds sensor to be comfortably the smallest and lightest DSLR zoom lens currently available, great for those users who wish their camera systems to be as portable as possible.
However despite its diminutive size, the 14-42mm still packs in some fairly exotic optics to deal with aberrations, in the shape of one extra-low dispersion (ED) glass element and two aspheric elements. It also incorporates a circular aperture diaphragm, which Olympus claim should provide 'beautiful rendition' of defocused areas of the image, and indeed consider to be one of the big advantages of this lens. The icing on the cake is an internal focusing system with a proper manual focus ring and a non-rotating front element, always a positive point for those photographers who like to use filters. Read the whole review here.