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In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane.
Leica Camera AG is a German company that manufactures cameras, lenses, binoculars, rifle scopes, microscopes and ophthalmic lenses. The company was founded by Ernst Leitz in 1869. The name Leica is derived from the first three letters of his surname (Leitz) and the first two of the word camera: lei-ca.
A fisheye lens is an ultra wide-angle lens that produces strong visual distortion intended to create a wide panoramic or hemispherical image. Fisheye lenses achieve extremely wide angles of view. Instead of producing images with straight lines of perspective, fisheye lenses use a special mapping, which gives images a characteristic convex non-rectilinear appearance.
The EF 50mm lenses are a group of normal prime lenses made by Canon that share the same focal length. These lenses are based on the classic double-Gauss lens, with the f/1.8 being a standard six-element double-Gauss with an air gap and powers between element 2 and 3 and its faster cousins adding additional elements. The 50mm focal length, when used with a 35mm film or full-frame sensor, has been widely considered to match the perspective seen by the human eye.
The double Gauss lens is a compound lens used mostly in camera lenses that reduces optical aberrations over a large focal plane.
The EF 85mm lenses are a group of medium telephoto prime lenses made by Canon Inc. that share the same focal length. These lenses have an EF type mount that fits the Canon EOS line of cameras.
Lens speed refers to the maximum aperture diameter, or minimum f-number, of a photographic lens. A lens with a larger maximum aperture is called a "fast lens" because it can achieve the same exposure with a faster shutter speed. Conversely, a smaller maximum aperture is "slow" because it delivers less light intensity and requires a slower (longer) shutter speed.
The name Noctilux is used by Leica to designate camera lenses that have a maximum aperture of f/0.95. This is the largest f-number offered by Leica in its lens range. The lens has been in production since 1966 and carries on to the present day. So far all Noctilux lenses have been made for the Leica M mount.
The Micro Four Thirds system is a standard released by Olympus and Panasonic in 2008, for the design and development of mirrorless interchangeable lens digital cameras, camcorders and lenses. Camera bodies are available from Blackmagic, DJI, JVC, Kodak, Olympus, Panasonic, Sharp, and Xiaomi. MFT lenses are produced by Cosina Voigtländer, DJI, Kowa, Kodak, Mitakon, Olympus, Panasonic, Samyang, Sharp, Sigma, SLR Magic, Tamron, Tokina, Veydra, and Xiaomi, amongst others.
The Nikon F-mount teleconverters are a group of magnifying lenses mounted between the lens and camera bodies using the Nikon F-mount. Currently, 1.4x, 1.7x and 2x converters are available separately; a fourth, the 1.25x, is available only with Nikon's newest 800mm supertelephoto lens.
The Panasonic Lumix DMC-GH2 is a digital camera with HD video recording capability that is part of the Micro Four Thirds system. Though commonly referred to as a DSLR camera, it has no mirror or optical viewfinder, but has instead both a fold-out LCD screen and a electronic viewfinder.
The Fujifilm X-mount is a type of interchangeable lens mount designed by Fujifilm for use in those cameras in their X-series line that have interchangeable-lenses. These lenses are designed for 23.6mm x 15.6mm APS-C sensors.
The Nikon D7100 is a 24.1-megapixel digital single-lens reflex camera model announced by Nikon in February 2013. It is a prosumer model that replaces the Nikon D7000 as Nikon's flagship DX-format camera, fitting between the company's entry-level and professional DSLR models. Nikon gives the D7100's Estimated Selling Price in the United States as US$949.95 for the body alone.
The Canon EOS 700D, known as the Kiss X7i in Japan or as the Rebel T5i in the Americas, is an 18.0 megapixel digital single-lens reflex camera made by Canon. It was announced on March 21, 2013 with a suggested retail price of US$849. As a part of the Canon EOS three-digit/Rebel digital line, it is the successor to the EOS 650D/Kiss X6i/Rebel T4i and is the predecessor of both the EOS 750D/Kiss X8i/Rebel T6i and EOS 760D/EOS 8000D/Rebel T6s.
The Canon EOS 70D is a digital single-lens reflex camera by Canon publicly announced on July 2, 2013 with a suggested retail price of $1,199. As a part of the Canon EOS two-digit line, it is the successor to the EOS 60D and is the predecessor of the EOS 80D.
The Canon EOS 1300D, known as the Rebel T6 in the Americas or as the Kiss X80 in Japan, is an 18.0 megapixels digital single-lens reflex camera (DSLR) made by Canon. It was announced on March 10, 2016 with a suggested retail price of US$549.00.
The Shenyang Zhongyi Mitakon Speedmaster 50 mm f/0.95 lens is a standard manual focus prime lens for Sony E-mount, announced by Shenyang Zhongyi Mitakon on May 6, 2014.
The Canon EOS 4000D is an 18.0 megapixels digital single-lens reflex camera (DSLR) made by Canon. It was announced on 25 February 2018 with a suggested retail price of €399 including an EF-S 18-55 f/3.5-5.6 III lens. It is also known as the EOS 3000D in some parts of the Asia Pacific region and the EOS Rebel T100 in North America.
Nikon Z-mount is an interchangeable lens mount developed by Nikon for its full-frame mirrorless digital cameras. In late 2018, Nikon released two cameras that use this mount, the Nikon Z 7 and the Nikon Z 6. In late 2019, Nikon announced their first APS-C sensor size Z-mount camera, the Nikon Z 50.
References
- ↑ "Noktor - Ultra Fast Lenses". Archived from the original on 2010-02-03. Retrieved 2010-08-12.