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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. Hemispherical photography - Wikipedia

   en.wikipedia.org/wiki/Hemispherical_photography

   Hemispherical photograph used to study microclimate of winter roosting habitat at the Monarch Butterfly Biosphere Reserve, Mexico.. Hemispherical photography, also known as canopy photography, is a technique to estimate solar radiation and characterize plant canopy geometry using photographs taken looking upward through an extreme wide-angle lens or a fisheye lens (Rich 1990).

4. 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 ...

5. Canon EF 8-15mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_EF_8-15mm_lens

   Canon EF 8-15mm lens. The EF8–15mm f/4L FISHEYE USM is a fisheye zoom lens for Canon digital single-lens reflex cameras (DSLRs) with an EF lens mount. It delivers 180° diagonal angle of view images for all EOS SLR cameras with imaging formats ranging from full-frame to APS-C, and provides 180° circular fisheye images for full-frame EOS models.

6. Panoramic photography - Wikipedia

   en.wikipedia.org/wiki/Panoramic_photography

   Panoramic photography is a technique of photography, using specialized equipment or software, that captures images with horizontally elongated fields of view. It is sometimes known as wide format photography. The term has also been applied to a photograph that is cropped to a relatively wide aspect ratio, like the familiar letterbox format in ...

7. Peleng lens - Wikipedia

   en.wikipedia.org/wiki/Peleng_lens

   Peleng 3.5/8A is an 8 mm super-wideangle circular fisheye photographic lens, and is designed as an interchangeable lens for Canon, Nikon, Pentax, Olympus digital or film cameras which have or do not have the instant-return diaphragm automatic control device [clarification needed]. The lens has a variable diaphragm from f/3.5 to f/16.

8. Sigma 8mm f/3.5 EX DG lens - Wikipedia

   en.wikipedia.org/wiki/Sigma_8mm_f/3.5_EX_DG_lens

   180. Retail info. MSRP. $1230 USD. The Sigma 8mm f/3.5 EX DG is a photographic lens introduced on 9 August 2006. It is a circular fisheye lens, designed to project a 180-degree field of view in all directions onto a circular image when used on a full-frame camera. The lens is available in Canon, Nikon, and Sigma mounts.

9. Panorama Tools - Wikipedia

   en.wikipedia.org/wiki/Panorama_Tools

   Free and open-source software portal. Panorama Tools (also known as PanoTools) are a suite of programs and libraries for image stitching, i.e., re-projecting and blending multiple source images into immersive panoramas of many types. It was originally written by German physics and mathematics professor Helmut Dersch.