Rodenstock was founded in 1877 by Josef Rodenstock and specialized in producing high-quality optical lenses for cameras and enlargers (Rodagon, Sironar, Apo-Ronar, Grandagon, Apo-Sironar). The technical optics division was sold to Linos AG in 2000, and continues to produce high quality camera lenses.
A 3-element, 3-group design, used for 8 mm motion picture cameras.
A 7-element design.
A 6-element design.
A 6-element design, used for 8 mm motion picture cameras.
Used for 8 mm motion picture cameras.
A 5-element design.
A 4-element, 4-group design.
Rodenstock has a long history of manufacturing lenses for large format cameras, and has several lines of lenses.
The least expensive of the Rodenstock lenses, these 3-element, 3-group designs have a 60° angle of view, and perform best when stopped down.
The APO-Sironar-N line is a 6-element, 4-group apochromatic design for general photography. Angle of view is 72°.
These 6-element, 4-group lenses are an update to the APO-Sironar-N line, incorporating a larger angle of view (75°) and extra-low dispersion (ED) glass elements to further reduce chromatic aberrations. Light fall-off at the edges of the field has also been reduced from the Sironar-N lenses.
This line of 6-element, 4-group macro lenses is optimized for reproduction ratios from 1:5 to 2:1.
The Grandagon lines are Rodenstock's wide-angle lenses. The APO-Grandagon line is apochromatic, incorporating ED-glass elements. This series has a 120° angle of view, but the extremely short focal lengths only cover mostly medium format image sizes. Designs are 8 elements in 4 groups.
With an angle of view of 105°, these 8-element, 4-group lenses are the standard wide angles of the Rodenstock line. In their respective focal lengths, they are among the fastest wide angles available from any manufacturer. The 90 mm f/6.8, by contrast to the rest of the line, is a 6 element design.
These are apochromatic lenses with 4 elements in 4 groups and an angle of view of approximately 48°. They are optimized for 1:1 reproduction ratios, but also give excellent results in general photography, with extremely low distortion.
Introduced in 1931, the Imagon uses an achromat doublet which is uncorrected for spherical aberration, and the well-known "sink strainer" aperture grilles. It is one of the classic soft-focus "portrait lenses". Though most Imagons are mounted in shutters which have normal (though unmarked) aperture iris controls, the aperture is controlled by one of three supplied aperture grilles. Each grille has an open central portion, noted with an "h-stop" designation which approximates the corresponding f-stop, surrounded by a series of smaller variable-opening holes. By rotating the outer rim of the grille, the opening of these smaller holes can be changed, and by this the amount of softness is also changed. Wider h-stops, or more-open holes, mean more softness.
One hazard of using such a lens is that when rotating the aperture grille, there is the possibility of focus shift. The photographer must verify that the plane of focus is correct after setting the desired amount of softness.
The Rodenstock digital lenses are optimized for the small pixel grids common to most digital cameras' sensors, from 12 μm to 5 μm, to reduce the effects that diffraction and color noise have on sharpness.
These are the standard lenses in Rodenstock's digital lineup. They are optimized for working apertures of f/8 to f/11, and for extremely flat field and uniform illumination.
The APO-Macro is optimized for reproduction ratios of 1:5 to 2:1.
The HR series of lenses is optimized for extreme resolving power, for use with extremely high-resolution (thus the name) CCD sensors, with pixel sizes smaller than 10 μm. Recommended working apertures are f/8 to f/11.
The current line of Rodenstock enlarging lenses have removable click-stops for setting aperture in the dark, an illuminated f-stop display, and an aperture pre-set feature, which allows setting of the working aperture, and quick changing from full aperture to the working aperture, for easy focusing and framing.
This is the budget line of enlarging lenses, which have 3-element, 3-group designs. They are optimized for 2x-8x reproduction ratios.
The 4-element, 3-group Rogonar-S line is optimized for between 2x-8x and 2x-10x reproduction, depending on the model.
Rodenstock's 6-element, 4-group range of enlarger lenses carry very even field illumination, and can be used as on-camera macro lenses in addition to normal enlarging lenses. Optimum working apertures are 2 stops below maximum aperture.
This line of 6-element, 4-group lenses is optimized for reproduction ratios of 20x and above.
The apochromatically-corrected Rodagon-N line features 7-element, 5-group designs, and optimum reproduction ratios of 2x-15x.
This is a wide-angle series of lenses, which allow greater enlargements and use of shorter focal-length lenses than would otherwise be possible. The WA lenses are 6 elements in 4 groups, and are optimized for 4x-15x reproduction.
Not necessarily enlarging lenses, these models are optimized for near 1:1 reproduction ratios, for purposes such as duplication of transparencies, or preparation of internegatives. They are 6-element, 4-group designs, and optimum f-stop is 2 stops below maximum aperture.
Optimized for 1:1 reproduction ratio.
Patent No. 07600872 Issued on Oct. 13, Assigned to Rodenstock GmbH for Spectacle lens device comprising an electrically adaptive area, spectacles, use and method for operating said spectacle lens device
Oct 15, 2009; ALEXANDRIA, Va., Sept. 15 -- Gregor EsserHelmut AltheimerEdda WehnerWerner MuellerJochen Brosig, Dietmar Uttenweiler, all of...