The Sony SAL-24105 24-105mm f/3.5-4.5 Lens is a compact standard zoom lens that covers the zoom range most often used for general-purpose photography. It provides excellent focusing operation and high-quality images throughout the zooming range. During autofocusing, photographers can easily hold the camera in good balance thanks to its Auto Clutch Mechanism, which does not rotate the focusing ring during AF drive. There is no need to operate any switch to activate the mechanism. In manual focusing, the wide, well-dampened ring is easy to control and rotates smoothly. The three aspheric surfaces (in two elements) reduce the total number of lens elements and thus shorten the length of the optical system. Optimally arranged, these aspheric lenses reduce spherical aberration, sagittal flare and coma. The result is a super-compact lens with high-quality images throughout the zooming range.