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 in the mid-range (24-100mm) and stopped down slightly, images are very sharp indeed. In the extreme ends – wide-angle or full telephoto – the lens shows slight faults: some chromatic aberration, distortion and corner softness, but nothing to the extreme. The only reservation I might have about the lens is its aperture capacity: by 50mm, its maximum aperture is ƒ/5.6, meaning the heavy lifting for low-light images will be done by the camera with higher ISO settings. Used with reasonable light levels, this really isn’t a factor.

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