The Rapid Rectilinear also named Aplanat is a famous
photographic lens
A camera lens, photographic lens or photographic objective is an optical lens (optics), lens or assembly of lenses (compound lens) used in conjunction with a camera body and mechanism to Imaging, make images of objects either on photographic film ...
design.
The Rapid Rectilinear is a lens that is symmetrical about its
aperture stop
In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image of ...
with four elements in two groups. It was introduced by
John Henry Dallmeyer John Henry Dallmeyer (6 September 183030 December 1883), Anglo-German optician, was born at Loxten, Westphalia, the son of a landowner.
On leaving school at the age of sixteen he was apprenticed to an Osnabrück optician, and in 1851 he came to Lo ...
in 1866. The symmetry of the design greatly reduces
radial distortion
In geometric optics, distortion is a deviation from rectilinear projection; a projection in which straight lines in a scene remain straight in an image. It is a form of optical aberration that may be distinguished from other aberrations such as ...
, improving on the
Petzval lens
The Petzval objective, or Petzval lens, is the first photographic portrait objective lens (with a 160 mm focal length) in the history of photography. It was developed by the Slovak mathematics professor Joseph Petzval in 1840 in Vienna, wi ...
.
See also
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Rectilinear lens
In photography, a rectilinear lens is a photographic lens that yields images where straight features, such as the edges of walls of buildings, appear with straight lines, as opposed to being curved. In other words, it is a lens with little or n ...
References
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External links
Rapid Rectilinear article
Photographic lens designs
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