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2. Sony FE 16-35mm F2.8 GM - Wikipedia

   en.wikipedia.org/wiki/Sony_FE_16-35mm_F2.8_GM

   The Sony FE 16-35mm F2.8 GM is a premium constant maximum aperture wide-angle full-frame (FE) zoom lens for the Sony E-mount, announced by Sony on May 17, 2017. The lens is scheduled for release on August 31, 2017. [1] This lens is part of Sony's professional GM zoom lens of the FE 12-24mm F2.8, FE 16-35mm F2.8, FE 24-70mm F2.8, and FE 70-200mm ...

3. Wide-angle lens - Wikipedia

   en.wikipedia.org/wiki/Wide-angle_lens

   Ultra wide angle lenses have a focal length shorter than the short side of the film or sensor [citation needed]. In 35 mm, an ultra wide-angle lens has a focal length shorter than 24 mm. Common wide-angle lenses for a full-frame 35 mm camera are 35, 28, 24, 21, 20, 18, and 14 mm

4. 35 mm equivalent focal length - Wikipedia

   en.wikipedia.org/wiki/35_mm_equivalent_focal_length

   35 mm equivalent focal lengths are calculated by multiplying the actual focal length of the lens by the crop factor of the sensor. Typical crop factors are 1.26× – 1.29× for Canon (1.35× for Sigma "H") APS-H format, 1.5× for Nikon APS-C ("DX") format (also used by Sony, Pentax, Fuji, Samsung and others), 1.6× for Canon APS-C format, 2× for Micro Four Thirds format, 2.7× for 1-inch ...

5. List of Sony E-mount lenses - Wikipedia

   en.wikipedia.org/wiki/List_of_Sony_E-mount_lenses

   Sony Lens Adapter E/A 4 2013 Mount adapter 35mm 160g LA-EA4 for A-mount lenses on full-frame E-mount camera, SLT-PD-AF with all AF lenses. [63] Sony Lens Adapter E/A 5 2020 Mount adapter 35mm 88g LA-EA5 only compatible with certain camera/lens combinations, [64] uses camera's on-sensor PD/CD AF (no mirror). [65] Sony Lens Adapter E/B 1 2019

6. Angle of view (photography) - Wikipedia

   en.wikipedia.org/wiki/Angle_of_view_(photography)

   Ultra wide angle lens is a rectilinear which is less than 24 mm of focal length in 35 mm film format, here 14 mm gives 114° and 24 mm gives 84° . Wide-angle lenses (24–35 mm in 35 mm film format) cover between 84° and 64° Normal, or Standard lenses (36–60 mm in 35 mm film format) cover between 62° and 40°

7. Zeiss Biogon - Wikipedia

   en.wikipedia.org/wiki/Zeiss_Biogon

   The advent of the Biogon opened the way to more extreme wide-angle lenses. Bertele continued to develop his design, patenting an asymmetric wide-angle lens in 1952 that covered an astonishing 120° angle of view "and beyond, practically distortion free", by adding a strong negative meniscus front element to the Biogon design, showing influences from earlier fisheye lens designs, including the ...

8. List of third-party Sony E-mount lenses - Wikipedia

   en.wikipedia.org/wiki/List_of_third-party_Sony_E...

   Cine Lens 15mm T3.5 MicroPrime CINE Lens [486] 18mm T2.8 MicroPrime CINE Lens [487] 21mm T1.6 MicroPrime CINE Lens [488] 25mm T1.5 MicroPrime CINE Lens [489] 35mm T1.3 MicroPrime CINE Lens [490] 50mm T1.2 MicroPrime CINE Lens [491] 75mm T1.5 MicroPrime CINE Lens [492] Cine Lens 18mm f/2.8 Cine Lens [493] 21mm f/1.5 Cine Lens [494]

9. Ultra wide angle lens - Wikipedia

   en.wikipedia.org/wiki/Ultra_wide_angle_lens

   An ultra wide-angle lens is a lens whose focal length is shorter than that of an average wide-angle lens, providing an even wider view. The term denotes a different range of lenses, relative to the size of the sensor in the camera in question. [1] For 1" any 9mm or shorter is considered ultra wide angle. For 4/3" any 10 mm or shorter lens is ...