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  2. Canon EF 50mm lens - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_50mm_lens

    Front and rear views of a Canon EF50mm f/1.4 USM. 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, [1] with the f/1.8 being a standard six-element double-Gauss with an air gap and powers between element 2 and 3 [1] and its faster cousins adding additional elements. [2]

  3. Canon Extender EF - Wikipedia

    en.wikipedia.org/wiki/Canon_Extender_EF

    The 100 mm f/2 on the left is incompatible with Canon Extenders, unlike the 70-200mm f/2.8 IS on the right. 300mm f/2.8 IS lens, no extender 300mm f/2.8 IS lens, 1.4× extender 300mm f/2.8 IS lens, 2.0× extender. These Extender EF lenses can only be used with lenses that have a compatible mount.

  4. Sigma 50mm f/1.4 EX DG HSM lens - Wikipedia

    en.wikipedia.org/wiki/Sigma_50mm_f/1.4_EX_DG_HSM...

    The Sigma 50mm f / 1.4 EX DG HSM is a normal prime lens made by the Sigma Corporation. The lens is produced in Canon EF mount , Four Thirds System , Nikon F-mount , Pentax K mount , Sigma's own SA mount , and the Sony/Minolta AF Mount varieties, all have the same optical formula.

  5. Double-Gauss lens - Wikipedia

    en.wikipedia.org/wiki/Double-Gauss_lens

    The design is presently used in inexpensive-but-high-quality fast lenses such as the Sony FE 50mm f / 1.8, the Canon EF 50mm f / 1.8 and the Nikon 50 mm f / 1.8D AF Nikkor. It is also used as the basis for faster designs, with elements added, such as a seventh element as in both Canon [ 35 ] and Nikon's 50 mm f / 1.4 offerings [ 36 ] or an ...

  6. Canon EF lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_lens_mount

    In 1987 Canon was the first to use USM (Ultrasonic Motor) with the Canon EF 300mm f/2.8L USM. [19] In 1989 Canon was the first to create a full frame f/1.0 AF (AutoFocus) lens and the only one until today with the Canon EF 50mm f/1.0L USM. In 1993 Canon was the first to create an interchangeable 10× superzoom lens for SLR cameras.

  7. Summilux - Wikipedia

    en.wikipedia.org/wiki/Summilux

    Leica Summilux-M 50 mm f /1.4 Version 2 (1961 – 1968) Leica Summilux 35 mm f /1.4 Version 1 Optical Diagram of Leica Summilux-R 50mm f/1.4 II lens.. The name Summilux is used by Leica and Panasonic Lumix to designate camera lenses that have a maximum aperture brighter than f/2, typically at f/1.4, but dimmer than f/1.0.

  8. Canon EF 35mm lens - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_35mm_lens

    The EF 35mm f / 1.4L II USM is a successor of the EF 35mm f / 1.4L USM. It was announced at the 27th of August 2015 and is available since October same year. [1] The EF 35mm f / 1.4L II USM lens is the first lens in Canon line up to use a Blue Spectrum Refractive Optics element (BR element) to reduce the chromatic aberration at the blue end of the spectrum. [2]

  9. Canon RF lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_RF_lens_mount

    Canon full-frame cameras have used the EF lens mount since 1987. In comparison with that mount, the RF mount's inner diameter is the same at 54 mm. [1] The RF mount's flange focal distance at 20 mm is much shorter than that of the Canon EF and EF-S mounts at 44 mm.

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