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Abbe number. In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of V indicating low dispersion. It is named after Ernst Abbe (1840–1905), the German physicist ...
The shallow depth of field provided by a telephoto lens also allows the subject of the photography to stand out better against the background. [11] Infrared corrected special-low-dispersion glass also has benefits to CCTV cameras. The low chromatic aberration of SLD glass allows the lens to always stay in focus, from visible light to infrared. [12]
Canon EF 70-300mm lens. Canon EF 80-200mm lens. Canon EF 85mm lens. Canon EF 100mm lens. Canon EF 100–200mm lens. Canon EF 100-300mm lens. Canon EF 180mm f/3.5L Macro USM lens. Canon EF 200-400mm lens.
The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes . Canon EF-S lens mount. 0–9. Canon EF-S 10–18mm lens. Canon EF-S 10–22mm lens. Canon EF-S 15–85mm lens. Canon EF-S 17–55mm lens. Canon EF-S 17–85mm lens.
The EF 1200 mm f / 5.6 L USM is a super-telephoto prime lens that was made by Canon Inc. It uses an EF mount, and is compatible with the Canon EOS camera range. It has a focal length of 1200 mm and so on a digital body with a sensor size of 22.5 mm × 15 mm (called 1.6× crop), such as a Canon EOS 40D or 450D, it provides a 35 mm field of view equivalent to that of a 1920 mm lens.
In optics, the Abbe sine condition is a condition that must be fulfilled by a lens or other optical system in order for it to produce sharp images of off-axis as well as on-axis objects. It was formulated by Ernst Abbe in the context of microscopes. [ 1] The Abbe sine condition says that. the sine of the object-space angle should be ...
Made in. Japan. Canon EOS M is the first mirrorless interchangeable-lens camera produced by Canon . DPReview noted that the EOS M is effectively a miniature version of the Canon EOS 650D, which was introduced in June 2012, with a simpler physical interface. [ 1] The letter M in EOS M stands for "mobility" and EOS means "electro-optical system".
See Canon EF lenses for the product line-up. See Canon EF-S lenses for the product line-up. EF-S lenses are built for APS-C 1.6x crop sensors, so they only work with models that use this sensor size. When EF-S lenses are used on a 35mm (full frame) camera the back element will hit the mirror assembly or cause substantial vignetting since the ...
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