The EF lens mount is the standard lens mount on the Canon EOS family of SLR film and digital cameras. EF stands for "Electro-Focus": automatic focusing on EF lenses is handled by a dedicated electric motor built into the lens. Mechanically, it is a bayonet-style mount, and all communication between camera and lens takes place through electrical contacts; there are no mechanical levers or plungers. The mount was first introduced in 1987.
The EF 16–35 mm lens is a family of professional wide-angle lenses made by Canon Inc. The original version, the EF 16-35mm f/2.8L USM, replaced the EF 17-35mm f/2.8L USM lens, which had itself replaced the EF 20-35mm f/2.8L lens.
The EF 17–40mm f/4L USM lens is a wide-angle lens made by Canon Inc. The lens has an EF mount to work with the EOS line of cameras. Other than the front element, it is sealed against dust and water, and features a diaphragm which remains nearly circular from f/4 to f/8. It is one of the few Canon photo lenses that are parfocal.
The EF 80–200mm lens is a discontinued telephoto zoom lens made by Canon. The lens has an EF lens mount that fits the EOS line of cameras.
The Canon EF 28–105 mm f/4–5.6 is an inexpensive zoom lens often included as a kit lens with Canon 35 mm single-lens reflex cameras. 28–105 mm is a standard wide to telephoto zoom range. The Canon EF 28–105 mm f/3.5–4.5 USM is a higher quality zoom lens with a better build quality. Currently every version of this lens is discontinued. Some versions of the lens may include the word macro or a flower icon which indicates macro capability, however due to the 1:5.2 image magnification ratio it cannot be considered as a true macro lens.
The Canon EF-S 10–22mm f/3.5–4.5 USM lens is a wide to ultra-wide angle zoom lens for Canon digital single-lens reflex cameras with a Canon EF-S lens mount. The field of view has a 35 mm equivalent focal length of 16–35mm, which is analogous to the EF 16–35mm f/2.8L on a full-frame camera. The 10–22mm is an internal focusing lens. Of the 13 elements, one is of Canon's Super Ultra-Low Dispersion glass and three are aspherical elements.
The EF 70–210mm lens is a discontinued telephoto zoom lens made by Canon Inc. It came in two different versions.
The EF 24–105mm f/4L IS USM is an EF mount wide-to-telephoto zoom lens. It was introduced by Canon in 2005 to complement the well-regarded 17–40mm f/4L USM and 70–200mm f/4L USM.
The EF 70–300mm lenses are a series of telephoto zoom lenses made by Canon Inc. They have a Canon EF lens mount to work with the EOS line of cameras.
The Canon EF-S 55–250mm f/4–5.6 IS lenses are a series of telephoto zoom lenses for Canon EOS digital single-lens reflex cameras with a Canon EF-S lens mount.
The EF 20–35mm lens is a wide-angle lens made by Canon Inc., with an EF mount. There are two models, an L-series f/2.8L and a consumer-grade f/3.5–4.5.
The Canon EF 90–300mm f/4.5–5.6 lens is a telephoto zoom lens for Canon EOS single-lens reflex cameras with an EF lens mount. There had been versions available: one standard version and one with USM.
The EF 100–300mm refers to three telephoto zoom lenses produced by Canon. They are of the EF lens mount that is compatible with the EOS line of cameras.
The Canon EF-S 18–135mm lens is a standard to short telephoto telezoom for Canon digital single-lens reflex cameras with an EF-S lens mount. The field of view has a 35 mm equivalent focal length of 29–216mm. With its 7.5× zoom range, it is placed into the superzoom category. Canon offers further lenses with even higher zoom ranges, such as the EF-S 18–200mm lens.
The EF 35-80mm f/4-5.6 USM lens is a family of EF mount wide-to-normal zoom lenses manufactured and sold by Canon. There were five versions made. One contained a peizoelectric motor, three contained a micro motor, and one contained a USM motor.
The EF 35-105mm lens is a family of EF mount wide-to-normal zoom lenses manufactured and sold by Canon. There were three versions made. The first version was released in 1987 as an f/3.5 - f/4.5 aperture lens. The next was released in 1991 as a f/4.5 - f/5.6 aperture lens. The last version was released in 1992 as a f/4.5 - f/5.6 USM version.
The Canon EF 35-135mm f/3.5-4.5 is an EF mount wide-to-normal zoom lens which was introduced in 1988.
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.
The Canon EF 38–76mm f/4.5–5.6 is an EF mount wide-to-normal zoom lens.
The Canon RF lens mount is an interchangeable-lens mount developed by Canon for its full-frame mirrorless interchangeable-lens cameras, and featured first by the EOS R, followed by the EOS RP. The RF mount was announced in September 2018. In May 2022 Canon announced APS-C EOS R cameras and RF-S lenses designed for these cameras.
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