Minolta retains a distinct advantage in the use of aspherical optics. With ordinary spherical lenses, the focal point varies according to whether the incident light passes through the central or peripheral part of the lens, thus producing spherical aberration. While perfect compensation has never been achieved, and is particularly difficult to compensate for in large diameter lenses, decreasing the lens curve or combining dispersion lenses are methods commonly used in an attempt to compensate for spherical aberration. Minolta's aspherical lenses are developed not only to correct spherical aberration in large diameter lenses, but also to take high contrast images with less blotting effects while in the largest aperture. Minolta's aspherical lenses are effective in correcting distortion while using wide and standard zooms. What's more, the use of aspherical lenses decreases the total number of lenses required to produce a complete lens.This technology has enabled Minolta to create more compact lenses.