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 Canon EF-S 18–55mm lens f/3.5–5.6 is a Canon-produced wide-angle to mid telephoto zoom lens for digital single-lens reflex cameras with an EF-S lens mount. The field of view has a 35 mm equivalent focal length of 28.8–88mm, and it is a standard kit lens on Canon's consumer APS-C DSLRs. In February 2017 Canon announced the new Canon EF-S 18–55mm lens f/4–5.6 IS STM with a smaller aperture, which made the lens 20% smaller according to Canon.
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 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, with the f/1.8 being a standard six-element double-Gauss with an air gap and powers between element 2 and 3 and its faster cousins adding additional elements. The 50mm focal length, when used with a 35mm film or full-frame sensor, has been widely considered to match the perspective seen by the human eye.
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.
Canon Inc. has produced seven different 24mm lenses for its Canon EF and EF-S lens mounts. Three have been discontinued after updated replacements were announced.
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 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.
Canon EOS M is the first mirrorless interchangeable-lens camera produced by Canon.
The Canon EF-M lens mount, introduced in 2012, is a derivative of the Canon EF lens mount designed for use with the Canon EOS M mirrorless interchangeable-lens camera. The EF-M lens mount is one of Canon's two new systems for mirrorless cameras, the other being the RF mount.
The Canon EF-S 10–18mm f/4.5–5.6 IS STM lens is a wide to ultra-wide angle zoom lens for Canon digital single-lens reflex cameras that support the Canon EF-S lens mount. It was announced on May 13, 2014. though it began shipping to retailers by the end of May. It was Canon's 2nd ultra-wide lens with image stabilization to ship to retailers, the first being the EF-M 11–22mm STM. Canon announced a 16–35mm lens with IS on the same day as the 10–18, the 16–35 was not available at retail until after the 10–18.
Zoom creep is a phenomenon in zoom lenses where the angle of view of the lens changes when gravity is allowed to freely act on it. If the lens has a zoom ring, holding it when the lens is held upwards or downwards will prevent this change. In lenses with push-pull zoom, creep is prevented by holding the extending part of the lens. Some lenses, such as the Tamron SP AF 17-50mm f/2.8 XR Di II LD Aspherical [IF] and Canon EF-S 18-135mm f/3.5-5.6 IS STM, have a zoom lock to stop the effect.
The Canon EF-M 55-200mm f/4.5-6.3 IS STM is an interchangeable telezoom lens for the Canon EOS M system of mirrorless cameras. It was announced by Canon on June 17, 2014.
The Canon EF-M 22mm f/2 STM is an interchangeable wide-angle lens announced by Canon on July 23, 2012. It was not available from Canon USA until the 27th of August 2015, but it was available as part of a kit with the EOS M in 2012.
The Canon EF-M 18-55mm f/3.5-5.6 IS STM is an interchangeable wide angle lens for the Canon EOS M system of mirrorless cameras. It was announced by Canon Inc. on June 22, 2012. It is the kit lens of the Canon EOS M camera. The EOS M3 camera is only available with this kit lens. This lens was for long time not available from Canon USA, but it is since 2015.
The Canon EF-M 15-45mm f/3.5-6.3 IS STM is an interchangeable zoom lens, covering fields of view from wide-angle to short telephoto, for the Canon EF-M system of Canon Inc. mirrorless interchangeable-lens camera. It was announced by Canon on October 13, 2015, together with the new Canon EOS M10 camera. The lens uses STM technology and a collapsible design which takes up less space when the lens is not in use.
The Canon EF-M 28mm f/3.5 Macro IS STM lens is an interchangeable Macro lens announced by Canon on May 11, 2016. The maximum magnification of this Macro lens is 1× in Normal mode and 1.2× in Super Macro mode. It is the first Canon lens with integrated macro light and uses the Hybrid IS.
The Canon EF-M 18-150mm f/3.5-6.3 IS STM is an interchangeable telezoom lens for the Canon EOS M system of mirrorless cameras. It was announced by Canon on September 15, 2016 together with the EOS M5.
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.
