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  2. Abbe number - Wikipedia

    en.wikipedia.org/wiki/Abbe_number

    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 ...

  3. Low-dispersion glass - Wikipedia

    en.wikipedia.org/wiki/Low-dispersion_glass

    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]

  4. Canon EF 14mm lens - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_14mm_lens

    The Canon EF 14mm f/2.8L USM is an ultra wide angle prime lens. It is the widest prime lens in the Canon EF series. Because it is corrected for a rectilinear projection, the field of view is less than that of the Canon 15mm fisheye . The front element of the lens is so prominent that it does not allow use of filters on the front.

  5. Abbe sine condition - Wikipedia

    en.wikipedia.org/wiki/Abbe_sine_condition

    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 ...

  6. List of Canon products - Wikipedia

    en.wikipedia.org/wiki/List_of_Canon_products

    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 ...

  7. Canon FL 1200mm lens - Wikipedia

    en.wikipedia.org/wiki/Canon_FL_1200mm_lens

    The Canon FL 1200mm f/11 was a super-telephoto lens marketed by Japanese optical manufacturer Canon in June 1972. [1] It was the longest super-telephoto lens in the Canon FL system. [2] The lens was part of a group of four convertible lenses: 400mm f/5.6, 600mm f/5.6, 800mm f/8, and the 1200mm f/11. [3]

  8. Canon EOS 400D - Wikipedia

    en.wikipedia.org/wiki/Canon_EOS_400D

    It is the successor of the Canon EOS 350D, and upgrades to a 10.1 megapixel CMOS sensor, a larger continuous shooting buffer, an integrated image sensor vibrating cleaning system (first used in a Canon EOS DSLR), a more precise nine-point autofocus system from the EOS 30D, improved grip, and a bigger 2.5-inch (64 mm) LCD with 230,000 pixels and a larger viewing angle which replaces the top ...

  9. Canon EOS 1200D - Wikipedia

    en.wikipedia.org/wiki/Canon_EOS_1200D

    Canon EOS 1300D. Canon EOS 1200D is an 18.1 megapixel digital single-lens reflex camera (DSLR) announced by Canon on 11 February 2014. [ 1] It is known as the EOS Kiss X70 in Japan, the EOS Rebel T5 in the Americas, and the EOS Hi in Korea. [ 2][ 3] The 1200D is an entry-level DSLR that introduces an 18 MP sensor from the 700D and 1080p HD ...

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