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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. Free Download Manager - Wikipedia

    en.wikipedia.org/wiki/Free_Download_Manager

    Free Download Manager is proprietary software, but was free and open-source software between versions 2.5 [6] and 3.9.7. Starting with version 3.0.852 (15 April 2010), the source code was made available in the project's Subversion repository instead of being included with the binary package.

  4. Sigma 4.5mm f/2.8 EX DC Circular Fisheye HSM lens - Wikipedia

    en.wikipedia.org/wiki/Sigma_4.5mm_f/2.8_EX_DC...

    It is a circular fisheye lens, designed to project a 180-degree field of view in all directions onto a circular image. It is the first such lens to provide the complete circular fisheye effect on crop factor digital SLR cameras, which do not have a full 36x24mm sensor. [1] This lens is available in Canon, Nikon, Sigma, Pentax and Sony mounts.

  5. List of free geology software - Wikipedia

    en.wikipedia.org/wiki/List_of_free_geology_software

    This is a list of free and open-source software for geological data handling and interpretation. The list is split into broad categories, depending on the intended use of the software and its scope of functionality. Notice that 'free and open-source' requires that the source code is available and users are given a free software license.

  6. Canon EF 8-15mm lens - Wikipedia

    en.wikipedia.org/wiki/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.

  7. 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.

  8. Minolta Fish-Eye Rokkor 16mm f/2.8 - Wikipedia

    en.wikipedia.org/wiki/Minolta_Fish-Eye_Rokkor_16...

    The Fish-Eye Rokkor 16mm f/2.8 is a prime fisheye lens produced by Minolta for Minolta SR-mount single lens reflex cameras, introduced in 1969 to replace an earlier fisheye lens, the UW Rokkor 18mm f/9.5. It is a full-frame fisheye lens with a 180° viewing angle across the diagonal.

  9. Category:Fisheye lenses - Wikipedia

    en.wikipedia.org/wiki/Category:Fisheye_lenses

    Samyang 7.5mm F3.5 UMC Fisheye MFT; Samyang 8mm f/3.5 Fisheye CS II; Samyang 8mm F2.8 UMC Fisheye; Samyang 8mm f3.5 fisheye; Samyang 12mm F2.8 ED AS NCS Fish-eye; Sigma 4.5mm f/2.8 EX DC Circular Fisheye HSM lens; Sigma 8mm f/3.5 EX DG lens; Sigma 8mm f/4 EX DG lens; Sigma 10mm f/2.8 EX DC Fisheye HSM lens; Skate video; Sony α Fish-Eye 16mm f/2.8