Chromatic aberration is a lens imperfection where light of different wavelengths (colours) fails to converge at the same focal plane, causing colour fringing or blurring at high-contrast edges in an image. This optical phenomenon is more noticeable in high-contrast scenes, telephoto lenses, and wide-aperture photography. Modern lenses often use achromatic or apochromatic designs, along with digital correction, to minimize chromatic aberration and produce sharper, more accurate images.