A lens with a curved, non-spherical surface. Used to reduce aberrations and enable a more compact lens size. Aspherical lenses minimize coma and other types of lens aberrations, even when used at the [..]

A lens designed with a non spherical shape so that it passes more lights or decreases barrel distortion on wide angle lenses.

A lens with edges flattened so that it is not a perfect sphere. These produce a much superior image.

Normally, a portion of the spherical front surface of a lens contains aberrations. Lens designers, as they strove to create a perfectly curved lens face, ultimately created a non- spherical, or aspherical lens.

A lens element that doesn't form part of a sphere. This is physically difficult to manufacture as most grinding/polishing equipment operates with a spherical action. This sort of lens is often mo [..]

A lens one or more of whose elements has a non-spherical surface. Aspherical surfaces are shaped to reduce the spherical and other aberrations.

A lens which one or more of the elements have a non-spherical surface. Aspherical surfaces are shaped to reduce the spherical and other aberrations.

A lens with a curved, non-spherical surface. Used to reduce aberrations and enable a more compact lens size. Aspherical lenses minimize coma and other types of lens aberrations, even when used at the [..]

A lens whose curved surface does not conform to the shape of a sphere; lenses are usually ground or moulded with spherical surfaces; because a spherical surface lens has difficulty in correcting distortion in ultra-wide-angle lenses or coma in large-aperture lenses brought about by spherical aberration, an aspherical lens is used. ASA:

lens with a curved, non-spherical surface. Used to reduce aberrations and enable a more compact lens size.

A type of lens that changes shape across its surface as opposed to one that is smooth and continuous. The lens will deviate a little from exactly a spherical shape, and stays predominantly abberation free.