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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.
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]
The Canon EOS R camera uses the Canon RF lens mount. The following lens models were available at the release date: [32] Canon RF 35mm F1.8 Macro IS STM; Canon RF 50mm F1.2 L USM; Canon RF 24-105mm F4 L IS USM; Canon RF 28-70mm F2 L USM; A Canon EF lens mounted to the EOS R via a Mount Adapter EF-EOS R
L lenses are often "fast", with maximum apertures commonly f / 2.8 or f / 4, and, with the exception of the RF 100–500 mm f/4.5–7.1L IS USM lens and the RF 1200 mm f/8L IS USM lens, never exceeding f / 5.6. Prime L lenses have a much larger maximum aperture, such as Canon's current 50mm and 85mm L lenses with maximum apertures of f / 1.2.
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. That lens was Canon EF 35-350mm f/3.5-5.6L USM. In 1993 Canon created the first Super UD (Ultra low Dispersion ...
The Canon FD 55mm ƒ/1.2 AL is a camera lens made by Canon, first introduced alongside the Canon F-1 single-lens reflex camera in March 1971. It was the first lens for any 35mm SLR system to incorporate an aspherical element. [1] The lens was manufactured until 1980.
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]
The Canon EF 50-200mm f / 3.5-4.5 is an EF mount normal-to-telephoto zoom lens. It is one of the first lenses in the Canon EF series. [1] In June 1988, Canon announced the EF 50-200mm f / 3.5-4.5L lens. This lens has very similar physical qualities compared to the EF50-200mm f / 3.5-4.5. [2]
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