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Progressive lenses are corrective lenses used in eyeglasses to correct presbyopia and other disorders of accommodation. They are characterised by a gradient of increasing lens power, added to the wearer's correction for the other refractive errors. The gradient starts at the wearer's distance prescription at the top of the lens and reaches a ...
Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.
The Kodak Type 025 Retina Reflex is an SLR camera that uses convertible lenses (German: Wechselobjektiv), made by Kodak Stuttgart, Germany. It was made between Spring 1957 and October 1958. Like many 35 mm SLR cameras of West German heritage it is equipped with a leaf shutter instead of a focal plane shutter. It was named Type 025 Retina Reflex ...
Kodak (Disc) aspheric 12.5mm f/2.8 Kodak Ektar 25mm f/1.9. Typical lens elements have spherically curved surfaces. However, this causes off-axis light to be focused closer to the lens than axial rays (spherical aberration); especially severe in wide angle or wide aperture lenses. This can be prevented by using elements with convoluted aspheric ...
The prototype of the Kodak Panoram camera, introduced with commercial success in 1900, is easily seen at first sight. The Kodak Panoram camera permits an instantaneous exposure over an extensive field of vision by an analogous turning of the lens and by a slit shutter passing in front of the film." It was first shown at the Exposition in Paris ...
Kodak Stereo Camera. The Kodak Stereo Camera was a 35mm film stereo camera produced between 1954 and 1959. Similar to the Stereo Realist, the camera employed two lenses to take twin shots of scenes, which could then be viewed in dedicated image viewers. The lenses supported adjustable apertures and variable shutter speeds.
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