Rapid Rectilinear

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

Rapid Rectilinear

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 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, improving on the Petzval lens.

Aplanat photographic lens.

See also

• Rectilinear lens

References

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

External links

• Rapid Rectilinear article