Rapid Rectilinear

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Rapid Rectilinear
Rapid rectilinear.svg
Introduced in 1866
Author John Henry Dallmeyer
Construction 4 elements in 2 groups
Aperture f/6 (original)
f/3.5 (portrait Aplanat)

The Rapid Rectilinear also named Aplanat is a famous photographic lens design.

The Rapid Rectilinear is a lens that is symmetrical about its aperture stop with four elements in two groups. It was introduced by John Henry Dallmeyer in 1866. The symmetry of the design greatly reduces radial distortion.

Aplanat photographic lens.

See also[edit]


  • Kingslake, Rudolph (1989). A History of the Photographic Lens. Academic Press. pp. 59–62. ISBN 0-12-408640-3. 

External links[edit]