 දර්ශකය 1ට වඩා වැඩි විට විශ්ලේෂණය වඩාත් සංකීර්ණ වෙයි. Aberrations[සංස්කරණය]මූලික ලිපිය: Aberration in optical systemsLenses do not form perfect images, and there is always some degree of distortion or aberration introduced by the lens which causes the image to be an imperfect replica of the object. Careful design of the lens system for a particular application ensures that the aberration is minimized. There are several different types of aberration which can affect image quality.Spherical aberration[සංස්කරණය]Spherical aberration occurs because spherical surfaces are not the ideal shape with which to make a lens, but they are by far the simplest shape to which glass can be ground and polished and so are often used. Spherical aberration causes beams parallel to, but distant from, the lens axis to be focused in a slightly different place than beams close to the axis. This manifests itself as a blurring of the image. Lenses in which closer-to-ideal, non-spherical surfaces are used a