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  2. Fisheye lens - Wikipedia

    en.wikipedia.org/wiki/Fisheye_lens

    A fisheye lens is an ultra wide-angle lens that produces strong visual distortion intended to create a wide panoramic or hemispherical image. [4][5]: 145 Fisheye lenses achieve extremely wide angles of view, well beyond any rectilinear lens. Instead of producing images with straight lines of perspective (rectilinear images), fisheye lenses use ...

  3. Distortion (optics) - Wikipedia

    en.wikipedia.org/wiki/Distortion_(optics)

    Fisheye lenses are wide-angle lenses with heavy barrel distortion and thus exhibit both these phenomena, so objects in the center of the image (if shot from a short distance) are particularly enlarged: even if the barrel distortion is corrected, the resulting image is still from a wide-angle lens, and will still have a wide-angle perspective.

  4. History of photographic lens design - Wikipedia

    en.wikipedia.org/wiki/History_of_photographic...

    The first widely-available fisheye lens for 35mm cameras was the Fisheye-Nikkor 8 mm f /8 from Nikon, released in 1962, which produced circular images similar to those popularized by the LIFE photographers; [71] that lens served as the "eye" of the HAL 9000 computer from the film 2001: A Space Odyssey, [72] although scenes depicting HAL's point ...

  5. Optical microscope - Wikipedia

    en.wikipedia.org/wiki/Optical_microscope

    Optical microscope. The optical microscope, also referred to as a light microscope, is a type of microscope that commonly uses visible light and a system of lenses to generate magnified images of small objects. Optical microscopes are the oldest design of microscope and were possibly invented in their present compound form in the 17th century.

  6. Afocal photography - Wikipedia

    en.wikipedia.org/wiki/Afocal_photography

    L2 - Eyepiece. L3 - Camera lens. Afocal photography, also called afocal imaging or afocal projection is a method of photography where the camera with its lens attached is mounted over the eyepiece of another image forming system such as an optical telescope or optical microscope, with the camera lens taking the place of the human eye. [1]

  7. Conoscopy - Wikipedia

    en.wikipedia.org/wiki/Conoscopy

    Conoscopy is an optical technique to make observations of a transparent specimen in a cone of converging rays of light. The various directions of light propagation are observable simultaneously. A conoscope is an apparatus to carry out conoscopic observations and measurements, often realized by a microscope with a Bertrand lens for observation ...

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