Definition: Chromatic aberration or Axial chromatic aberration - different wavelengths of light coming into focus in front of and behind the film plane, resulting in points of light exhibiting a rainbow-like halo and reduction in sharpness, Coma - the image of a point source of light cannot be brought into focus, but has instead a comet shape, Curvilinear distortion - distortion consisting of curved lines, Field curvature - the image is incorrectly curved, Lateral chromatic aberration also known as Transverse chromatic aberration - variation in the magnification at the sides of a lens (this aberration type used to be termed “lateral colour”), Spherical aberration - variation in focal length of a lens from center to edge due to its spherical shape - generally all parts of the image, including its center. The effects of lens aberration usually increase with increases in aperture or in angle of field. 3 Abort To stop a program while its running. Aborting can be initiated by the user or by the program itself.
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