The 55-200mm ƒ/4-5.6 fared well in our tests: sharpness is very good, even when used wide open, with light corner shading. CA is noticeable but light: corner shading is minor, and as is typical for this class of lens, distortion is fairly objectionable when used at the lens’ longer focal lengths.

Optically, we can’t find a whole lot to complain about with the Pentax 17-70mm ƒ/4. It’s decently sharp even wide open; light falloff and distortion aren’t much to be concerned about. Outside of the middle of the zoom range, the numbers for chromatic aberration are a little high for our taste: I’d assume that in [...]

Optically, the Olympus 14-42mm ƒ/3.5-5.6 tested quite well, showing sharp results wide open, and even better when stopped down slightly. CA is a bit higher than we’d like at wide-angle, but happily the worst of it manifests only when the lens is significantly stopped down. At 25mm, the lens offers excellent performance, tack-sharp at f/5.6. [...]

Panasonic has done well with this lens. The ability to autofocus during movie mode was an absolute must for the saleability of the GH-1, which required a fast, silent autofocus mechanism; in this capacity, the 14-140mm delivers handily. Optically, the lens is no slouch, providing pleasantly sharp images in almost any situation, and when used [...]