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2. Fisheye lens - Wikipedia

   en.wikipedia.org/wiki/Fisheye_lens

   The first types of fisheye lenses developed were "circular" — lenses which took in a 180° hemisphere and projected it as a circle within the film frame. By design, circular fisheye lenses thus cover a smaller image circle than rectilinear lenses designed for the same sensor size. The corners of a circular fisheye image will be completely black.

3. Minolta UW Rokkor 18mm f/9.5 - Wikipedia

   en.wikipedia.org/wiki/Minolta_UW_Rokkor_18mm_f/9.5

   The UW Rokkor 18mm f/9.5 is a prime fisheye lens produced by Minolta for Minolta SR-mount single lens reflex cameras, introduced in 1966 as the system's first fisheye lens.It is a full-frame fisheye lens with a 180° viewing angle across the diagonal, and was replaced when the Minolta Fish-Eye Rokkor 16mm f/2.8 lens was released in 1969.

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...

   Retail info. MSRP. $1400 USD. The Sigma 4.5mm f/2.8 EX DC circular fisheye is a photographic lens manufactured by Sigma Corporation. 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 ...

5. The best lenses for astrophotography in 2022: fast ... - AOL

   www.aol.com/news/best-lenses-astrophotography...

   We pick the best lenses for astrophotography fans shooting a starry night sky, to suit a range of cameras and budgets The best lenses for astrophotography in 2022: fast ultra-wide lenses for the ...

6. Minolta AF Fish-Eye 16mm f/2.8 - Wikipedia

   en.wikipedia.org/wiki/Minolta_AF_Fish-Eye_16mm_f/2.8

   Originally produced by Minolta, and currently produced by Sony, the AF Fish-Eye 16mm, is a prime Fisheye lens compatible with cameras using the Minolta A-mount and Sony A-mount lens mounts. It is a full-frame fisheye lens with a 180° viewing angle. The front of the lens does not have a mount for filters. Rather a number of filters are built in ...

7. List of Nikon F-mount lenses with integrated autofocus motor

   en.wikipedia.org/wiki/List_of_Nikon_F-mount...

   All Nikon zoom AF-lenses have focal length encoders added. Nikon AF-P: The lens contains a pulse motor (utilizing stepping motors) to focus smoother and quieter than previous drive systems. Nikon AF-I, Sigma/Tamron/Tokina: no designation: The lens contains an integrated focus electric motor. The Nikon type was produced from 1992 to 1996 and is ...