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  2. Fisheye lens - Wikipedia

    en.wikipedia.org/wiki/Fisheye_lens

    In a circular fisheye lens, the image circle is inscribed in the film or sensor area; in a diagonal ("full-frame") fisheye lens, the image circle is circumscribed around the film or sensor area. This implies that using a fisheye lens for a different format than it was intended for is easy (as opposed to a rectilinear lens), and may change its ...

  3. Distortion (optics) - Wikipedia

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

    In geometric optics, distortion is a deviation from rectilinear projection; a projection in which straight lines in a scene remain straight in an image.It is a form of optical aberration that may be distinguished from other aberrations such as spherical aberration, coma, chromatic aberration, field curvature, and astigmatism in a sense that these impact the image sharpness without changing an ...

  4. Rectilinear lens - Wikipedia

    en.wikipedia.org/wiki/Rectilinear_lens

    While this example has been rectilinear-corrected by software, high quality wide-angle lenses are built with optical rectilinear correction. In photography, a rectilinear lens is a photographic lens that yields images where straight features, such as the edges of walls of buildings, appear with straight lines, as opposed to being curved.

  5. DxO ViewPoint - Wikipedia

    en.wikipedia.org/wiki/DxO_ViewPoint

    DxO ViewPoint allows users to correct the horizon, keystoning, volume distortion (volume anamorphosis), and a number of lens distortions automatically or through sliders. Lens distortions include barrel, pincushion, and fisheye. DxO ViewPoint's corrections are based on DxO's data created through a large volume of images produced using different ...

  6. Ultra wide angle lens - Wikipedia

    en.wikipedia.org/wiki/Ultra_wide_angle_lens

    Notice the barrel distortion typical for fisheye lenses in the curvilinear image. While this example has been rectilinear-corrected by software, high-quality wide-angle lenses are built with optical rectilinear correction. Bearing 8/3.5 fisheye. A capture of an entire scene, including the sun is shown (180-degree circular fisheye).

  7. Curvilinear perspective - Wikipedia

    en.wikipedia.org/wiki/Curvilinear_perspective

    Curvilinearity in photography: Curvilinear (above) and rectilinear (below) image. Notice the barrel distortion typical for fisheye lenses in the curvilinear image. While this example has been rectilinear-corrected by software, high quality wide-angle lenses are built with optical rectilinear correction.

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