Aplanat Lens
Steinheil was a German optical company. It made camera lenses from the XIXth century until at least the 1970s.
Emil Busch Vintage Emil Busch Rapid Aplanat Ser D 3 F 8 Foc 260mm Brass Antique Cameras Vintage Photo Accessories
APMQ lens design must be matched to the spherical wavefront generated by the preceding LAPQ lens.
Aplanat lens. At the same time Steinheil invented a similar construction the Aplanat lens. Scanned by Uwe Kulick Image rights A Rapid Rectilinear lens or RR lens is a symmetrical pair of cemented achromatic doublets. For example the Universal Aplanat of Steinheil used a common crown glass with a dense barium flint and most of the later Rapid Rectilinear lenses also employed this type of glass combination.
It was introduced by Dallmeyer in 1866. The Rapid Rectilinear also named Aplanat is a famous photographic lens design. It was introduced by Dallmeyer in 1866.
Actually the Rapid Rectilinear is a fairly expensive lens to manufacture. The Rapid Rectilinear is a lens that is symmetrical about its aperture stop with four elements in two groups. Some Niklas have an ICA badge inside the housing on the left.
There are five different powers of lenses in High index mineral 35 mm. The APM lens acts to shorten the combined focal length of the system without introducing additional coma or spherical aberration. This is fitted with the Extra Rapid Aplanat Helios 18 F13 lens.
At the same time Steinheil invented a similar construction the Aplanat lens. The original shellac finish on the brass is in still excellent condition. Aplanatic lens synonyms aplanatic lens pronunciation aplanatic lens translation English dictionary definition of aplanatic lens.
It was introduced by John Henry Dallmeyer in 1866. To introduce no spherical aberration or coma the APM lens design must be matched to the spherical wavefront generated by the preceding LAP lens. This design came midway between the invention of photography in 1840 and the introduction of the Anastigmat in 1890 and lenses of this type were fitted to all the better cameras for nearly sixty years a record scarcely surpassed by any.
Spherical aberration is axially symmetric and occurs when rays from a point on the axis passing through the outer zones of the lens focus at a different distance from the lens than rays passing through the central zone. CVI provides each APMQ. The outer lens elements of the two lens groups are concave meniscus lens elements the inner lens elements are convex meniscus.
Lots of conflicting information. Lens Light rays converge when passing through a biconvex lens and diverge when passing through a biconcave lens f indicates the focus. The large visual field is an essential part of ML Aplanat since it affects orientation comfort and confidence.
Multilens is a Swedish company that during a long time has developed and produced different optical solutions. It can be optics for persons. Steinheil made a few cameras at various times and during the late 1940s it developed an advanced 35mm camera with interchangeable lenses the Casca.
In 1887 the six-element 60mm. Multilens - An optical company in Sweden. Design of Aplanatic Objectives.
Also the APMQ lens must be properly spaced from its companion laser aplanat. This is the same lens used on the ICA Sirene 135 from 1929 yet my camera has extra features present on the Niklas. We shall use the term aplanat for a relatively thin spherically corrected achromat that is also corrected for OSC and thus satisfies the Abbe sine condition.
Its a pair of achromatic lens element groups arranged symmetrically before and behind the diaphragm. In 1866 it invented the Aplanat lens. A lens designed to correct spheric aberration and coma qv.
Also has some features from the ICA Lola 1912-1914. The symmetry of the design greatly reduces radial distortion. It has already been mentioned that Abbe used the term aplanatic to refer to a lens system corrected for both spherical aberration and OSC.
The Rapid-Rectilinear and Aplanat lenses were scalable over many focal lengths and fields of view for all contemporaneous media and they were the standard moderate-aperture general-purpose lenses for more than half a century. An aplanatic lens is designed to minimize two monochromatic wavefront errors called spherical aberration and coma. Therefore APMQ and LAPQ lenses are used in pairs.
This requirement How To Order APM-750-150 780 PM Lens Part Number. F155-f20 reproduction Aplanat replaced the wide-angle reproduction Aplanat. Each lens is inscribed with tiny identification marks indicating the power of the lens.
According to Eder the lens inspired Von Hoeghs Dagor lens 71. This requirement determines the front and back radii and center thickness of the meniscus lens. Above is an 1896 list of the various focal lengths.
One of the most important photographic objectives ever made was the famous Rapid Rectilinear or Aplanat of 1866. Simplex Rapid Aplanat Brass Lens - Focal lenght is about 240mm - F8 Lens will easily cover about 5x7 inch Rear thread diameter ca. Glass in excellent condition.
42mm This lens is fully usable and in excellent condition with light signs of use and age. A lens corrected for spherical aberration. Only a few of these lenses were manufactured 15.
By special needs we mean needs that normal optics cant satisfy. Iris is fully working. And below the six-element wide-angle reproduction Aplanat n.
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Ernemann Rapid Aplanat Serie D 13x18 Brass Lens Large Format Photography Vintage Cameras
