View source for Canon EF lens mount

{{short description|Standard lens mount on the Canon EOS family}}
{{Distinguish|Canon EF camera}}
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{{Infobox camera mount
| mount_name        = Canon EF mount
| image             = Canon EF lens mount.jpg
| caption           = The electronic contacts (gold-plated) of an EF mount lens.
| type              = [[Bayonet mount|Bayonet]]
| external_diameter = 65 mm<ref>{{cite web | title=The EF lens mount | website=Canon EF Lens and RF lens review | date=2011-10-05 | url=https://eflens.com/lens_articles/ef_lens_mount.html | access-date=2025-08-25}}</ref>
| inner_diameter    = 54 mm
| tabs              = 
| connectors = 8 electrical pins
| flange            = 44 mm
| introduced = {{Start date and age|1987|03|df=yes}}
| replaced = [[Canon FD lens mount|Canon FD mount]]
}}
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 mount|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.

Canon claims to have produced its 100-millionth EF-series interchangeable lens on April 22, 2014.<ref>{{cite web|url=http://www.photographybay.com/2014/04/30/canon-surpasses-100-million-ef-lenses-produced/|title=Canon Surpasses 100 Million EF Lenses Produced|author=Eric Reagan|work=Photography Bay|date=30 April 2014 }}</ref>

== History ==
[[File:canon vs nikon number of lenses.svg|thumb|Number of Canon EF lenses sold over time (red), compared with Nikon F mount lenses (blue)]]
The EF mount replaces its predecessor, the [[Canon FD|FD mount]].
The standard [[autofocus]] lens mounting technology of the time used a motor in the camera body to drive the mechanics of the focus [[helicoid]] in the lens by using a transfer lever. The key innovation of the EF series was to use a motor inside the lens itself for focusing. This allowed for autofocusing lenses which did not require mechanical levers in the mount mechanism, only electrical contacts to supply power and instructions to the lens motor. The motors were designed for the particular lens they were installed in.

The EF mount reversed the mechanical logic of the FD mount.  The FD mount provided the three-eared bayonet fitting on the camera body, and each FD lens provided a breech-lock receptacle to register and fasten the lens to the bayonet.  The EF mount reverses this logic, providing the bayonet on each lens, and a receptacle on the camera body.

When the EF mount was introduced in 1987, it had the largest mount diameter (54&nbsp;mm internal) among all 35&nbsp;mm SLR cameras.<ref name="canon">{{cite web
|url=http://global.canon/en/c-museum/history/story07.html
|title=History Hall 1987-1991
|website=Canon Camera Museum
|access-date=2017-06-23
}}</ref>

The EF series includes over eighty lenses, encompassing focal lengths from 8 to 1200&nbsp;mm.  Many EF lenses include such features as Canon's [[ultrasonic motor]] (USM) drive, an [[image stabilization]] system (IS), diffractive optics (DO) and, particularly for L-series lenses, [[fluorite]] and [[aspherical lens]] elements.

== Versatility ==
[[File:Canon EF camera mount.jpg|thumb|The EF mount of a [[Canon EOS 50]]]]
[[File:Canon EF IMG 0067.JPG|thumb|Electronics of an EF-S lens]]
Its large diameter and relatively short [[flange focal distance]] of 44.0&nbsp;mm allows mechanical adaptation of EF camera bodies to many types of non-EF lenses.<ref name="markerink">W.J. Markerink maintains an article on ''Camera Mounts & Registers'' which gives much more detail about flange focal distances and lens compatibility.</ref> It is possible to mount lenses using the [[Nikon F mount]], Olympus OM, [[Leica R bayonet|Leica R]] and universal [[M42 lens mount]]s (among others) by the use of a mechanical adapter without electronic control of the aperture or autofocus. In contrast, parfocal adaptation of EF lenses to non-EF camera bodies is not possible with only a mechanical adapter that does not contain optical elements.

EF mount lenses are somewhat compatible with newer Canon bodies, though the reverse is not true:

* [[Canon EF-S lens mount|EF-S lens mount]] cameras can mount EF lenses without an adapter
* [[Canon EF-M lens mount|EF-M lens mount]] cameras can mount EF lenses with an EF-EOS M adapter<ref name="EOS M press release">{{cite press release |url=http://www.usa.canon.com/cusa/consumer/news_events/press_releases?pageKeyCode=pressreldetail&docId=0901e024805d7bdb |title=Put Your Creativity into Motion with the New EOS M Digital Camera |publisher=Canon U.S.A., Inc. |date=23 July 2012 |access-date=23 July 2012 |archive-date=22 September 2012 |archive-url=https://web.archive.org/web/20120922081807/http://www.usa.canon.com/cusa/consumer/news_events/press_releases?pageKeyCode=pressreldetail&docId=0901e024805d7bdb |url-status=dead }}</ref>
* [[Canon RF lens mount|RF mount]] cameras can mount EF lenses with a variety of adapters

Lenses for the earlier [[Canon FD lens mount]] are not usable for general photography on an EF mount cameras, unless adapters with optical elements are used because they are made for a flange focal distance of only 42.0&nbsp;mm. [[Infinity focus]] would be lost with an adapter which lacks optical elements. The Canon FD-EOS adapter is rare and is only usable with certain FD telephoto lenses. With a manual connection, the aperture and focus controls of the lens cannot be controlled or read from the camera; the lens must be focused manually. Since the only possible metering is through-the-lens, the lens must be manually stopped down to accurately meter at anything less than full aperture. (This is called [[stop-down metering]].)

=== Third-party lenses ===
Compatible third-party lenses with the EF lens mount are manufactured by [[Yongnuo]], [[Samyang Optics|Samyang]], [[Schneider Kreuznach|Schneider]], [[Sigma Corporation|Sigma]], [[Tamron]], [[Tokina]], Cosina and [[Carl Zeiss AG|Carl Zeiss]]. The manufacturers of these lenses have [[reverse engineered]] the EOS electronics—except Zeiss, which does not have the rights to use the autofocus or the electronic aperture control of EOS cameras {{citation needed|date=December 2020}}. The use of these third-party lenses is not supported by Canon. Sometimes compatibility problems arise, as no third party has access to Canon's specifications for camera-to-body communication.<ref>{{cite web
 |url         = http://photonotes.org/articles/beginner-faq/lenses.html
 |author      = NK Guy
 |date        = January 6, 2007
 |work        = Canon EOS Beginners' FAQ
 |title       = Part III – Lenses
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20111222143222/http://photonotes.org/articles/beginner-faq/lenses.html
 |archive-date = December 22, 2011}}</ref> These compatibility issues mostly occur when using a newer body with an older third-party lens. Over time, most of these issues have been resolved by the major third-party brands.

=== Third-party cameras ===
Due to the high market penetration of EF-mount lenses, other camera manufacturers began to offer EF-mount cameras. Since the EF-mount was created for SLR cameras with their long focal flange distance, [[mirrorless interchangeable-lens camera]]s can use EF lenses with a mechanical adaptor that bridges the distance.

[[Red Digital Cinema Camera Company|Red Digital Cinema Company]] offers various camera models that can be equipped with an electronic EF-mount.
Many [[Blackmagic Design]] cameras are sold in EF-mount variants.
For [[Sony E-mount]] various adaptors enable using EF-mount lenses with full electronic control.

== Controls and features ==
[[File:Canon EF Nomenclature.jpg|thumb|An EF lens showing its different controls and features]]
Canon EF lenses typically have a number of controls, switches and physical features, used by the photographer to control the lens. The types and number of the controls can vary from lens to lens. With the most basic lenses having only a few, to the most complex having over a dozen different controls and switches.

This is a list of the different controls and switches found on most Canon EF lenses, along with a detailed description on what they are used for.

'''Lens mount index:''' This raised, round red mark is found on all EF lenses. It is used for matching the EF lens mount to the mount on an EOS body, so one can connect the lens to the body quickly.

'''Focusing ring:''' This control, found on most EF lenses, is used for [[focus (optics)|focusing]] the lens. It is usually a ring on the lens body, that can be turned.

'''Zoom ring:''' This control is found on most EF [[zoom lens]]es. It is used for changing the focal length of the lens. The zoom ring usually has certain, common, focal lengths marked on it. To set the zoom ring to any given focal length, one must turn the ring so that the marked focal length matches the zoom index. The zoom index is typically a white, or black, line found next to the zoom ring.

[[File:Canon EF lens distance scale.jpg|thumb|left|Distance scale of an EF lens]]
'''Distance scale window:''' This feature is found on many EF lenses. This feature, while not a control or switch, is useful to the photographer for determining, or setting, the lens's focus distance. It is used in conjunction with the '''Focusing ring'''. When rotated, the distance scale will also rotate to show the changing focus distance. On some lenses the distance scale also has an infrared index. These are shown as red markings below the distance scale. This is used for making focus adjustments when the photographer is doing infrared photography, as lenses typically focus infrared light at a different point than visible light, and therefore achieving correct focus using visible light will result in an out-of-focus infrared image. To make an adjustment, first focus the subject, then turn the '''Focusing ring''' so it matches the corresponding infrared index mark.

[[File:Canon EF lens FDRLS FMS.jpg|thumb|Focus mode, and focusing range switches]]
'''Focus mode switch:''' This switch is found on most EF lenses that have an autofocus feature. It is used for setting the lens to either autofocus mode, or manual focus. When set to [[autofocus]] mode (AF), the lens will autofocus when directed to by the camera. When set to manual focus (MF), the lens is focused using the '''Focusing ring'''. Some lenses support full-time manual focusing (FT-M), which allows the photographer to focus the lens manually even with the mode switch set to AF, without damaging the lens (as could happen if a lens without FT-M is manually focused while in AF mode).

'''Focusing distance range limiter switch:''' This switch is found on most longer focal length lenses, and macro lenses. It is used for limiting the focusing distance range of the lens when using it in autofocus mode. Most lenses have two settings; these are usually full focus range (from minimum focus distance to infinity), and distant focus range (from halfway point of focus range to [[infinity]]). Other lenses have three settings, with the additional setting usually being near focus range (from minimum focus distance to halfway point of focus range). Longer focal length lenses and macro lenses have a relatively long travel distance for the focusing mechanism inside the lens; this feature shortens the autofocus time. When the photographer knows they will not need a certain part of the focus distance range, limiting it will help shorten the autofocus time, and possibly prevent "focus hunting".

'''Soft focus ring:''' This ring is found only on the 135&nbsp;mm 'Soft Focus' prime lens, and enables a variable soft focus effect from completely sharp (0) to very soft (2), although it has little effect when used with apertures over f/5.6. Although the ring can be set to any position, two 'stops' are implemented at positions 1 and 2.

[[File:Canon EF lens ISS ISMS.jpg|thumb|left|Both types of image stabilizer switches]]
'''Image stabilizer switch:''' This switch is found on all EF lenses that feature an image stabilizer. It is used for turning the image stabilizer "on"( | ), or "off"( o ).

'''Image stabilizer mode switch:''' This switch is found on many EF lenses that feature an image stabilizer, particularly those of longer focal lengths. The switch has two settings on most lenses: Mode 1 and Mode 2. The newest IS Mark II versions of certain EF super telephoto lenses (the 300mm f/2.8L,<ref>{{cite web|url=http://www.the-digital-picture.com/Reviews/Canon-EF-300mm-f-2.8-L-IS-II-USM-Lens-Review.aspx|title=Canon EF 300mm f/2.8 L IS II USM Lens Review|last=Carnathan|first=Bryan|date=10 November 2011|publisher=The-Digital-Picture.com|access-date=22 April 2013}}</ref> 400mm f/2.8L,<ref>{{cite web|url=http://www.the-digital-picture.com/Reviews/Canon-EF-400mm-f-2.8-L-IS-II-USM-Lens-Review.aspx|title=Canon EF 400mm f/2.8 L IS II USM Lens Review|last=Carnathan|first=Bryan|publisher=The-Digital-Picture.com|access-date=22 April 2013}}</ref> 500mm f/4L,<ref>{{cite web|url=http://www.the-digital-picture.com/Reviews/Canon-EF-500mm-f-4-L-IS-II-USM-Lens-Review.aspx|title=Canon EF 500mm f/4 L IS II USM Lens Review|last=Carnathan|first=Bryan|date=26 September 2012|publisher=The-Digital-Picture.com|access-date=22 April 2013}}</ref> and 600mm f/4L<ref name="Carnathan 600mm">{{cite web|url=http://www.the-digital-picture.com/Reviews/Canon-EF-600mm-f-4-L-IS-II-USM-Lens-Review.aspx|title=Canon EF 600mm f/4 L IS II USM Lens Review|last=Carnathan|first=Bryan|date=27 September 2012|publisher=The-Digital-Picture.com|access-date=April 22, 2013}}</ref>), plus the 200–400mm f/4L IS<ref>{{cite web|url=http://www.the-digital-picture.com/Reviews/Canon-EF-200-400mm-f-4-L-IS-USM-Extender-1.4x-Lens-Review.aspx|title=Canon EF 200-400mm f/4 L IS USM Extender 1.4x Lens Review|last=Carnathan|first=Bryan|date=November 18, 2013|publisher=The-Digital-Picture.com|access-date=11 January 2014}}</ref> and 100–400mm f/4–5.6L IS II,<ref>{{cite press release |url=http://www.usa.canon.com/cusa/about_canon?pageKeyCode=pressreldetail&docId=0901e02480d957ad |title=Canon U.S.A. Introduces New Super-Telephoto Zoom Lens, The Compact And Highly Mobile Canon EF 100-400mm f/4.5-5.6L IS II USM |publisher=Canon U.S.A. |date=10 November 2014 |access-date=11 November 2014}}</ref> have a third setting, Mode 3. Mode 1 is normal mode, used for typical photography, where the subject does not move. Mode 2 is used for panning; this is useful for sports or wildlife photography, where the subject moves constantly and one will need to pan. Mode 3, intended to track action, is similar to Mode 2 in that it ignores panning; however, it only applies stabilization when the shutter is released—the viewfinder image is not stabilized.<ref name="Carnathan 600mm"/> One should not use Mode 1 for panning as this will typically cause blurred photographs; the image stabilizer will attempt to correct for all motion, including the panning motion, but cannot do so due to the limited range of motion of the IS mechanism. Older lenses that have an image stabilizer, but do not feature this switch, are permanently in Mode 1. Some newer lenses, such as the [[Canon EF-S 18-200mm lens]], are able to detect if they are being panned in either axis and will automatically disable the stabilization for the axis parallel to movement and therefore do not require this switch.

'''Autofocus stop buttons:''' These buttons are found on some super telephoto EF lenses, evenly spaced around the front collar of the lens. They are used for temporarily stopping the autofocus feature of the lens. Only one button needs to be pressed to activate the feature. To use this button, one must first have the autofocus active, then when one wishes to halt autofocus, one presses and holds the button. To resume autofocus, one releases the button. Some newer bodies allow these buttons to be assigned to perform other functions; for instance, the [[Canon EOS 7D]] allows the photographer to set these buttons to perform any of six functions.

'''Focus preset:''' The focus preset feature is found on most super telephoto EF lenses. The focus preset feature uses one switch, one button, and one ring. It is used for presetting a given focus distance into memory, so that the photographer can quickly recall the focus distance, without the need for autofocus. The switch has three settings "off"( o ), "on"( | ), or "on with sound"( (<small>(</small>- ), and is used for turning on the feature, and deciding if sound is desired. The "set" button is used for saving the focus distance into memory. The focus preset ring is used for recalling the memory save point. It is a thin knurled ring, usually located in front of the '''Focusing ring'''. To use this feature, one must set the switch to either "on" or "on with sound", focus the lens to the desired distance, then press the "set" button. After this, when the feature is turned on, the photographer can turn the focus preset ring, and the lens will recall and focus quickly to the distance that was saved. This feature is useful for sports and birding photography (for instance, to allow rapid focusing on the goal or on a spot where the birds may perch).

[[File:Canon EF 17-40mm f4L USM lens mount.jpg|thumb|Rear gel filter holder on an EF lens]]
'''Filter mounting:''' This mount is used for attaching filters to EF lenses. There are three types: front threaded mount, inner drop-in mount, and rear gelatin holders. Front threaded filters are used on most lenses, and are attached by threading and tightening the filter. Inner, drop-in filter mounts are used on super telephoto EF lenses. They are attached by first pressing the two buttons on the filter mount, and pulling it out. Then either a round threaded filter is attached, or one can use a gelatin filter. Rear gelatin filter holders are used by cutting out a sheet of gelatin, to the size shown on the back of the lens and then sliding it into the holder. Filter mounts are useful for all types of photography, and every EF lens has either one or two of the three types used.

'''Lens hood mount:''' This feature is found on most EF lenses. This mount is used for attaching the [[lens hood]]. The hood mount is of a bayonet style on most EF lenses, though a clip-on style hood mount is used for a small selection of current lenses.

'''Tripod collar:''' This feature is found on most longer focal length lenses, and macro lenses. The tripod collar is used for attaching the tripod ring. There are two main styles of tripod rings. One type is opened up, placed on the lens' tripod collar, then closed and tightened. The other type does not open, but instead is slid up the lens from the mount end (which can only be done when the lens is not mounted on a camera body) and tightened. To set the tripod ring so that it is level with the lens, rotate the ring until the index mark on the tripod ring matches the index mark on the distance scale. The tripod ring is used for attaching a tripod/monopod near to the point of balance of the lens-body combination, more conveniently than the camera body. In the case of larger and heavier lenses, there is also less strain on the lens mount if the body is supported by the tripod-mounted lens than if the lens were to be supported by a tripod-mounted body.

== Related technologies ==

=== Ultrasonic motor drive {{Anchor|Ultrasonic Motor drive|Ultrasonic Motor Drive}} ===
[[File:Canon Ultrasonic.svg|thumb|Ultrasonic logo]]
[[Ultrasonic motor]] (USM) lenses appeared with the introduction of the [[Canon EF 300mm f/2.8L USM|EF 300&nbsp;mm {{f/}}2.8L USM lens]] in 1987. Canon was the first camera maker to successfully commercialise the USM technology. EF lenses equipped with USM drives have fast, silent and precise autofocus operations, and consume less power compared to other AF drive motors.

There are three types of USMs: ''ring-type USM'', ''micromotor USM'', and ''Nano USM''. Ring-type USM allows for [[full-time manual]] focus (FT-M) operations without switching out of AF mode. Micromotor USM is used to bring down the cost of the lens. It is possible to implement FT-M even with micromotor USM; however, it requires additional mechanical components, and the vast majority of micro-USM lenses do not offer such capability. Nano USM was introduced in 2016 with the release of Canon's latest iteration of the [[Canon EF-S 18–135mm lens|EF-S 18–135mm lens]]. It is intended to offer the AF speed of ring-type USM with the quietness of STM mechanisms (see below).

Some older USM lenses are identified with a gold ring and the word "Ultrasonic" printed in gold on the lens barrel. L lenses with USM don't have the gold ring, but they still have the word "Ultrasonic" printed on the lens barrel.

=== Stepping motor {{Anchor|Stepper motor|Stepping motor}} ===
[[File:Canon EF 40mm STM lens (focus stacked version).jpg|240px|thumb|[[Canon EF 40mm lens|Canon EF 40mm f/2.8 STM]] [[pancake lens]]]]
Canon announced [[Stepper motor|stepping motor]] (STM) lenses first in June 2012, alongside the [[Canon EOS 650D|EOS 650D/Rebel T4i/Kiss X6i]].

Canon stated that this technology allows smooth and silent autofocus, and with compatible bodies (the first of which is the 650D) will provide continuous autofocus in live view and video.<ref>{{cite press release|url=http://www.usa.canon.com/cusa/about_canon?pageKeyCode=pressreldetail&docId=0901e0248057dd10 |title=The New EOS Rebel T4i DSLR Camera Puts The Power And Creativity of DSLR Stills And Video at Your Fingertips |publisher=Canon U.S.A., Inc. |date=2012-06-08 |access-date=2012-06-08}}</ref> Unlike USM, STM lenses use focus-by-wire to enable full-time manual mode. Two main disadvantages are linked to focus-by-wire: First, the need to computationally process the input before the intended action is executed leads to a sometimes perceptible lag. Second, using the motor requires power, so when an STM lens is not connected to a camera or the camera is switched off, changing the focus is impossible.

All stepping-motor lenses are marked with the letters "STM" on the front of the lens as part of the model designation.

=== Image stabilizer {{Anchor|Image Stabilizer}} ===
[[File:Canon EF 300mm f4L IS USM Label.JPG|thumb|The image-stabilized [[Canon EF 300mm f/4L IS USM]] lens]]
The [[image stabilization]] (IS) technology detects handheld motion and optically corrects it. It only corrects handheld motion; if the subject of the photograph is moving, IS will not stop it. It also can only stabilize so much motion, ranging from two to five stops, depending on the specific IS in the lens. Canon has released several versions of the IS system, including the following:

* The first version, first used in the [[Canon EF 75-300mm lens|75-300mm]] lens (1995), takes approximately one second to stabilize, provides approximately two stops of stability, is not suitable for use on a tripod, or for panning.
* The [[Canon EF 300mm lens|300mm {{f/}}4L IS USM]] lens, released in 1997, adds IS Mode 2, which detects whether panning is taking place horizontally or vertically, and only compensates for vibration in the plane perpendicular to the plane of panning.
* In 1999, with the release of the IS super-telephoto lenses ([[Canon EF 300mm lens|300mm {{f/}}2.8L]] through [[Canon EF 600mm lens|600mm {{f/}}4L]]), tripod detection was added, so that the lens could be used on a tripod with IS turned on.
* In 2001, a new version of the Image Stabilizer was created for the [[Canon EF 70-200mm lens|70–200mm {{f/}}2.8L]]. This version takes approximately 0.5s and can be stabilized up to three stops.
* In 2006, the [[Canon EF 70-200mm lens|70–200&nbsp;mm {{f/}}4L IS USM]] was released with an Image Stabilizer which allows up to four stops of stabilization.<ref>{{cite web |url=http://global.canon/en/c-museum/product/ef391.html |title=EF70-200mm f/4L IS USM |website=Canon Camera Museum |publisher=Canon |access-date=2017-06-23}}</ref>
* In 2008, the [[Canon EF 200mm lens|200mm f/2L IS USM]] was released with a new version of IS which allows up to five stops of stabilization.<ref>{{cite web |url=http://www.canon.com/camera-museum/tech/report/f_index.html |title=Canon Camera Museum 124; Technology Hall |publisher=Canon.com |access-date=2013-06-10 |url-status=dead |archive-url=https://web.archive.org/web/20120105153107/http://www.canon.com/camera-museum/tech/report/f_index.html |archive-date=5 January 2012}}</ref>
* In 2009, the [[Canon EF 100mm lens|100&nbsp;mm {{f/}}2.8L Macro IS USM]] became the first Canon lens with a [[Hybrid Image Stabilizer]].<ref>{{cite web|url=http://www.dpreview.com/news/0909/09090102canon100mmmacro.asp#press |title=Canon announces the arrival of the first EF lens to feature Hybrid IS |publisher=Dpreview.com |access-date=2013-06-10}}</ref> In addition to correcting angular movement, Hybrid IS also corrects for shift movement.<ref>{{cite web|url=http://www.dpreview.com/news/0907/09072207canonhybridis.asp |title=New Canon Hybrid IS world's first Image Stabilizer to compensate for two types of camera shake |publisher=Dpreview.com |access-date=2013-06-10}}</ref>
* In 2011, with the release of the [[Canon EF 300mm lens|300mm {{f/}}2.8L IS II]] and [[Canon EF 400mm lens|400mm {{f/}}2.8L IS II]], IS Mode 3 was added. This mode is similar to Mode 2, except that stabilization is applied only when the shutter is released.
* Some newer lenses include an Image Stabilizer which can automatically detect whether the user is panning and respond accordingly, and therefore these lenses do not have an IS mode switch.

All EF lenses that support IS have the words "Image Stabilizer" written on the lens.  On some of Canon's larger telephoto lenses, the words "Image Stabilizer" are etched onto a metal plate affixed to the lens.

=== Diffractive optics ===
[[File:Canon 70-300 DO MG 2020.jpg|thumb|right|The green-ringed EF 70–300&nbsp;mm {{f/}}4.5–5.6 DO IS USM]]
[[Diffractive optics]] (DO) are special lens elements that are used in some lenses. DO lenses are usually smaller and lighter and are better at handling [[chromatic aberration]], compared to conventional lenses of similar focal length and aperture value. They are more expensive to make. Only the EF 400&nbsp;mm {{f/}}4 DO IS USM, its updated Mark II version, and the EF 70–300&nbsp;mm {{f/}}4.5–5.6 DO IS USM contain DO elements. DO lenses have a green ring on the barrel.

=== L-series lenses ===
{{Main article|Canon L lens}}

Top range Canon EF lenses are designated "L-series", or "Luxury" lenses.<ref>{{cite web
 |url         = http://web.canon.jp/Imaging/eos/system/ef_lens_system-e.html
 |title       = EF Lens System
 |author      = Canon
 |access-date  = 1 August 2008
 |url-status     = dead
 |archive-url  = https://web.archive.org/web/20090218004639/http://web.canon.jp/Imaging/eos/system/ef_lens_system-e.html
 |archive-date = 18 February 2009}}</ref> L series lenses are compatible with the full range of EF or EF-S mounts and, as they are aimed at the high-end user, most also include environmental or weather sealing and a constant maximum aperture. All L lenses are supplied complete with a hood and a pouch or case, which are not generally included with non-L lenses. Distinctive visual cues include a red ring around the lens and an off-white colour on longer-focal-length models. The latter also helps to reflect light and reduce heat absorption and subsequent internal expansion of lens components that can affect the image quality of long focal length lenses.<ref>{{cite web|title=Lenses: Black or white lenses?|url=http://cpn.canon-europe.com/content/education/infobank/lenses/black_or_white_lenses.do|website=Canon Europe|access-date=18 May 2018|archive-date=13 May 2012|archive-url=https://web.archive.org/web/20120513043117/http://cpn.canon-europe.com/content/education/infobank/lenses/black_or_white_lenses.do|url-status=dead}}</ref>

All L lenses include at least one [[fluorite glass|fluorite]], ultra-low-[[dispersion (optics)|dispersion]] glass element, super ultra-low-[[dispersion (optics)|dispersion]] glass element, and/or certain types of [[aspherical lens|aspherical elements]]. (Note that a number of non-L lenses also use aspherical elements, and at least one non-L lens has a Super UD element.) Most L lenses feature an [[ultrasonic motor]] (USM) for focusing.

==Timeline of innovations==
In 1987 Canon was the first to use USM (Ultrasonic Motor) with the Canon EF 300mm f/2.8L USM.<ref name="web.archive.org">{{cite web |url=http://glassfirst.usa.canon.com/heritage/ |title=75 years of optics - Explore the world of Canon optics |website=glassfirst.usa.canon.com |access-date=15 January 2022 |archive-url=https://web.archive.org/web/20150208141517/http://glassfirst.usa.canon.com/heritage/ |archive-date=8 February 2015 |url-status=dead}}</ref>

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) lens with the Canon EF 400mm f/5.6L USM.

In 1995 Canon created the first lens with IS (Image Stabilization). That lens was the Canon EF 75-300mm f/4-5.6 IS USM.

Canon in 2001 was the first to create a lens with DO (multi layered Diffractive Optical element) element. That lens was the Canon EF 400mm f/4 DO IS USM.

Canon in 2008 created the first lens with SWC technology (Subwavelength Structure Coating). That lens was the Canon EF 24mm f/1.4L II USM.

Canon in 2009 created the first lens with Hybrid IS (Image Stabilization) which compensates both angle camera shake and shift camera shake with the Canon EF 100mm f/2.8L Macro IS USM.

Canon in 2010 was the first to create a lens with Fluoride coating. That lens was the Canon EF 70-300mm f/4-5.6L IS USM.

Canon in 2011 made the first fisheye zoom lens, both circular and rectangular. That lens was the Canon EF 8-15mm f/4L Fisheye USM.

Canon in 2012 made the first wide angle lens with Image Stabilization. That lens was the Canon EF 24mm f/2.8 IS USM.

Canon in 2013 created the first telephoto with built-in 1.4× extender. That lens was Canon EF 200-400mm f/4L IS USM Extender 1.4x.<ref name="web.archive.org"/>

== Communication protocol ==
The communication protocol between the camera and the lens is 8-data-bit, 1-stop-bit [[Serial Peripheral Interface Bus|SPI]] (mode 3). The pins, from right to left on the lens, are:

{| class="wikitable"
|+ Canon EF mount pins<ref name=canon /><ref>{{cite web
|url=http://photo.net/canon-eos-digital-camera-forum/005nXu
|title=Photo.net: Canon EF focusing protocol
|access-date=12 January 2009
}}</ref>
! Name
! Function
! Notes
|-
| VBat || +6&nbsp;[[volt|V]] to power internal lens focus motors
| rowspan="8" style="width:150px;"| [[File:Canon EF lens mount.jpg|150px]]
Present on all EOS bodies and lenses
|-
| P-Gnd
| rowspan=2 | Power ground
|-
| P-Gnd
|-
| VDD || +5.5&nbsp;[[volt|V]] Digital logic power
|-
| DCL || Data from camera to the lens (MOSI)
|-
| DLC || Data from the lens to the camera (MISO)
|-
| LCLK || Camera body generated clock signal (SCLK, CPOL=1)
|-
| D-GND || Digital logic ground
|-
| COM1 || [[Teleconverter]] common<ref name="1.4×">{{cite web|url=http://f20c.com/stuff/canon/partslist/EXTENDER%20EF%201.4X.PDF|title=Canon Extender EF 1.4x Parts Catalog|access-date=21 September 2018}}</ref><ref name="2×">{{cite web|url=http://f20c.com/stuff/canon/partslist/EXTENDER%20EF%202X.PDF|title=Canon Extender EF 2.0x Parts Catalog|access-date=21 September 2018}}</ref><ref name=LSC>{{cite web
 |url        = http://www.ozerki.net/photosight/PhotoDocs/Manuals/partlist/Lens/Life%20Size%20Converter%20EF.pdf
 |title      = Canon Life Size Converter Parts Catalog
 |access-date = 5 April 2009
}}{{dead link|date=September 2017 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
| rowspan=3 | [[File:Canon EF telephoto lens mount.jpg|150px]]
Only on most L-series and some macro lenses
|-
| EXT0 || Short to COM1 for 'Life Size Converter' and 1.4× teleconverter
|-
| EXT1 || Short to COM1 for 2× and 1.4× teleconverter
|}

The information from the lens is used by the camera body for focusing and metering, and with digital camera bodies it is used to record the lens parameters in the [[Exif]] data in the images.

All [[Canon L lens#Telephoto 2|L series primes 135mm or longer]], the [[Canon EF 400mm lens|400mm DO]], the [[Canon EF 70–200mm lens|70–200mm]] zooms, the [[Canon EF 100-400mm lens|100–400mm]] zooms, the
[[Canon EF 200–400mm lens|200–400mm]] zoom and the [[Canon EF 50mm f/2.5 Compact Macro lens|50mm Compact Macro]] have three additional communication pins.  These additional pins are used by the [[Canon Extender EF]] adapters and the ''Life-Size Converter EF'' to indicate to the lens the change in focal length so that it is able to report the correct focal length and aperture to the camera body when mounted on a [[teleconverter]].  The lens also reduces autofocus speed when a teleconverter is attached to improve autofocus accuracy.

== List of Canon EF lenses ==

The "I", "II", "III" Roman numeral suffix after the focal length(s) indicates the generation number.  While I is used in the table below, it is not used in official Canon model numbers; the original model lacks a Roman numeral and only the second and subsequent generations have them. Roman numerals are used only when the entire model designation—focal length(s), aperture, IS, DO, L status, and motor mechanism—is identical from one version to the next. This means, for example, that when Canon introduced IS to lenses whose prior versions lacked that feature (24mm, 28mm, 35mm IS primes in 2012, 16–35mm IS zoom in 2014), the first IS versions lacked Roman numerals.

The EF lenses are grouped below by their focal lengths:
* [[#Zoom|Zoom]]: for [[zoom lens]]es that have a range of focal lengths
* [[#Prime|Prime]]: for [[prime lens]]es that have a single focal length

=== Zoom ===
[[File:Canon EF 35-70mm F3.5-4.5 lens.jpg|thumb|[[Canon EF 35-70mm lens|Canon EF 35–70&nbsp;mm {{f/}}3.5–4.5 lens]]]]
{| class="wikitable sortable" style="text-align:center"
|- "
! [[Focal length]]
! [[Aperture|{{shy|Ap|er|tu|re}}]]
! {{shy|In|tro|duct|ion}}
! [[Ultrasonic motor|USM]]
! [[Image stabilization|IS]]
! [[Canon L lens|{{shy|L-se|ries}}]]
! [[Diffractive optics|DO]]
! Filter size
|-
|[[Canon EF 8-15mm lens|8–15&nbsp;mm]]{{br}}([[Fisheye lens|fisheye]])
|{{f/}}4
|2010
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|rear
|-
|[[Canon EF 11-24mm lens|11–24&nbsp;mm]]
|{{f/}}4
|2015
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|rear
|-
|[[Canon EF 16-35mm lens|16–35&nbsp;mm I]]
|{{f/}}2.8
|2001
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|16–35&nbsp;mm II
|{{f/}}2.8
|2007
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|82&nbsp;mm
|-
|16–35&nbsp;mm III
|{{f/}}2.8
|2016
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|82&nbsp;mm
|-
|16–35&nbsp;mm IS
|{{f/}}4
|2014
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|[[Canon EF 17-35mm lens|17–35&nbsp;mm]]
|{{f/}}2.8
|1996
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|[[Canon EF 17-40mm lens|17–40&nbsp;mm]]
|{{f/}}4
|2003
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|[[Canon EF 20-35mm lens|20–35&nbsp;mm]]
|{{f/}}2.8
|1989
|{{No}}
|{{No}}
|{{Yes}}
|{{No}}
|72&nbsp;mm
|-
|20–35&nbsp;mm
|{{f/}}3.5–4.5
|1993
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|77&nbsp;mm
|-
|[[Canon EF 22-55mm lens|22–55&nbsp;mm]]
|{{f/}}4-5.6
|1998
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 24-70mm lens|24–70&nbsp;mm]]
|{{f/}}2.8
|2002
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|24–70&nbsp;mm II
|{{f/}}2.8
|2012
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|82&nbsp;mm
|-
|24–70&nbsp;mm
|{{f/}}4
|2012
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|[[Canon EF 24-85mm lens|24–85&nbsp;mm]]
|{{f/}}3.5-4.5
|1996
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|67&nbsp;mm
|-
|[[Canon EF 24-105mm lens|24–105&nbsp;mm]]
|{{f/}}4
|2005
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|24–105&nbsp;mm II
|{{f/}}4
|2016
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|24–105&nbsp;mm STM
|{{f/}}3.5-5.6
|2014
|{{No}}
|{{Yes}}
|{{No}}
|{{No}}
|77&nbsp;mm
|-
|[[Canon EF 28-70mm lens|28–70&nbsp;mm]]
|{{f/}}2.8
|1993
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|28–70&nbsp;mm II
|{{f/}}3.5-4.5
|1988
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|52&nbsp;mm
|-
|[[Canon EF 28-80mm lens|28–80&nbsp;mm]]
|{{f/}}2.8-4
|1989
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|72&nbsp;mm
|-
|28–80&nbsp;mm
|{{f/}}3.5-5.6
|1996
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|28–80&nbsp;mm II
|{{f/}}3.5-5.6
|1999
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|28–80&nbsp;mm I
|{{f/}}3.5-5.6
|1991
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|28–80&nbsp;mm II
|{{f/}}3.5-5.6
|1993
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|28–80&nbsp;mm III
|{{f/}}3.5-5.6
|1995
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58mm
|-
|28–80&nbsp;mm IV
|{{f/}}3.5-5.6
|1996
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|28–80&nbsp;mm V
|{{f/}}3.5-5.6
|1999
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 28-90mm lens|28–90&nbsp;mm]]
|{{f/}}4-5.6
|2000
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|28–90&nbsp;mm II
|{{f/}}4-5.6
|2003
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|28–90&nbsp;mm III
|{{f/}}4-5.6
|2004
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 28-105mm lens|28–105&nbsp;mm]]
|{{f/}}3.5-4.5
|1992
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|28–105&nbsp;mm II
|{{f/}}3.5-4.5
|2000
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|28–105&nbsp;mm
|{{f/}}4-5.6
|2002
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 28-135mm lens|28–135&nbsp;mm]]
|{{f/}}3.5-5.6
|1998
|{{Yes}}
|{{Yes}}
|{{No}}
|{{No}}
|72&nbsp;mm
|-
|[[Canon EF 28-200mm lens|28–200&nbsp;mm]]
|{{f/}}3.5-5.6
|2000
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|72&nbsp;mm
|-
|28–200&nbsp;mm
|{{f/}}3.5-5.6
|2000
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|72&nbsp;mm
|-
|[[Canon EF 28-300mm lens|28–300&nbsp;mm]]
|{{f/}}3.5-5.6
|2004
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|[[Canon EF 35-70mm lens|35–70&nbsp;mm]]
|{{f/}}3.5-4.5
|1987
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|52&nbsp;mm
|-
|35–70&nbsp;mm
|{{f/}}3.5-4.5A
|1988
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|52&nbsp;mm
|-
|[[Canon EF 35–80mm lens|35–80&nbsp;mm III]]
|{{f/}}4-5.6
|1995
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|52&nbsp;mm
|-
|35–80&nbsp;mm
|{{f/}}4-5.6
|1992
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|52&nbsp;mm
|-
|35–80&nbsp;mm Power Zoom
|{{f/}}4-5.6
|1990
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|52&nbsp;mm
|-
|[[Canon EF 35–105mm lens|35–105&nbsp;mm]]
|{{f/}}3.5-4.5
|1987
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|35–105&nbsp;mm
|{{f/}}4.5-5.6
|1992
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 35–135mm lens|35–135&nbsp;mm]]
|{{f/}}3.5-4.5
|1988
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|35–135&nbsp;mm
|{{f/}}4-5.6
|1990
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 35–350mm lens|35–350&nbsp;mm]]
|{{f/}}3.5-5.6
|1993
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|72&nbsp;mm
|-
|[[Canon EF 38-76mm lens|38–76&nbsp;mm]]
|{{f/}}4.5-5.6
|1995
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|52&nbsp;mm
|-
|[[Canon EF 50-200mm lens|50–200&nbsp;mm]]
|{{f/}}3.5-4.5
|1987
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|50–200&nbsp;mm
|{{f/}}3.5-4.5
|1988
|{{No}}
|{{No}}
|{{Yes}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 55–200mm lens|55–200&nbsp;mm]]
|{{f/}}4.5-5.6
|1998
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|52&nbsp;mm
|-
|55–200&nbsp;mm II
|{{f/}}4.5-5.6
|2003
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|52&nbsp;mm
|-
|[[Canon EF 70–200mm lens|70–200&nbsp;mm]]
|{{f/}}2.8
|2001
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|70–200&nbsp;mm II
|{{f/}}2.8
|2010
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|70–200&nbsp;mm III<ref name=":0">{{Cite web |url=https://www.usa.canon.com/internet/portal/us/home/about/newsroom/press-releases/press-release-details/2018/20180607-lens/20180607-lens |title=Canon Updates Lineup of EF L-Series Telephoto Zoom Lenses With the Introduction of EF 70-200MM F/4L II USM and EF 70-200MM F/2.8L IS II USM |website=usa.canon.com}}</ref>
|{{f/}}2.8
|2018
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|70–200&nbsp;mm
|{{f/}}2.8
|1995
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|70–200&nbsp;mm
|{{f/}}4
|2006
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|67&nbsp;mm
|-
|70–200&nbsp;mm II<ref name=":0" />
|{{f/}}4
|2018
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|72&nbsp;mm
|-
|70–200&nbsp;mm
|{{f/}}4
|1999
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
|67&nbsp;mm
|-
|[[Canon EF 70–210mm lens|70–210&nbsp;mm]]
|{{f/}}3.5-4.5
|1990
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|70–210&nbsp;mm
|{{f/}}4
|1987
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 70-300mm lens|70–300&nbsp;mm]]
|{{f/}}4.5-5.6
|2004
|{{Yes}}
|{{Yes}}
|{{No}}
|{{Yes}}
|58&nbsp;mm
|-
|70–300&nbsp;mm
|{{f/}}4-5.6
|2005
|{{Yes}}
|{{Yes}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|70–300&nbsp;mm
|{{f/}}4-5.6
|2010
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|67&nbsp;mm{{wbr}}<ref>{{cite web |url=http://www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup/ef_70_300mm_f_4_5_6l_is_usm#Specifications |title=Canon EF 70-300mm f/4-5.6L IS USM Specification |author=Canon |access-date=7 May 2015 |archive-date=27 October 2015 |archive-url=https://web.archive.org/web/20151027201056/http://www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup/ef_70_300mm_f_4_5_6l_is_usm#Specifications |url-status=dead}}</ref>
|-
|70–300&nbsp;mm II
|{{f/}}4-5.6
|2016
|{{Yes}}
|{{Yes}}
|{{No}}
|{{No}}
|67&nbsp;mm{{wbr}}<ref>{{cite web |url=https://www.usa.canon.com/internet/portal/us/home/products/details/lenses/ef/telephoto-zoom/ef-70-300mm-f-4-5-6-is-ii-usm |title=EF 70-300mm f/4-5.6 IS II USM |author=Canon |access-date=16 September 2016}}</ref>
|-
|[[Canon EF 75–300mm lens|75–300&nbsp;mm]]
|{{f/}}4-5.6
|1991
|{{Yes}}
|{{Yes}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|75–300&nbsp;mm II
|{{f/}}4-5.6
|1995
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|75–300&nbsp;mm III
|{{f/}}4-5.6
|1999
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 80-200mm lens|80–200&nbsp;mm]]
|{{f/}}2.8
|1989
|{{No}}
|{{No}}
|{{Yes}}
|{{No}}
|72&nbsp;mm
|-
|80–200&nbsp;mm
|{{f/}}4.5-5.6
|1992
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|52&nbsp;mm
|-
|80–200&nbsp;mm II
|{{f/}}4.5-5.6
|1990
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|52&nbsp;mm
|-
|[[Canon EF 90–300mm lens|90–300&nbsp;mm]]
|{{f/}}4.5-5.6
|2003
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|90–300&nbsp;mm
|{{f/}}4.5-5.6
|2002
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 100–200mm lens|100–200&nbsp;mm]]
|{{f/}}4.5A
|1988
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 100-300mm lens|100–300&nbsp;mm]]
|{{f/}}4.5-5.6
|1990
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|100–300&nbsp;mm
|{{f/}}5.6
|1987
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|100–300&nbsp;mm
|{{f/}}5.6
|1987
|{{No}}
|{{No}}
|{{Yes}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon EF 100-400mm lens|100–400&nbsp;mm]]
|{{f/}}4.5-5.6
|1998
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|100–400&nbsp;mm II
|{{f/}}4.5-5.6
|2014
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|77&nbsp;mm
|-
|[[Canon EF 200-400mm lens|200–400&nbsp;mm]]
|{{f/}}4
|2013
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
|52&nbsp;mm rear
|}
[[File:Canon EF lenses.jpg|thumb|Two EF lenses and an EF-S lens (center).]]

=== Prime ===
{| class="wikitable sortable" style="text-align:center"
|- "
! [[Focal length]]
! [[Aperture|{{shy|Ap|er|tu|re}}]]
! {{shy|In|tro|duct|ion}}
! [[Macro photography|{{shy|Mac|ro}}]]
! [[Ultrasonic motor|USM]]
! [[Image stabilization|IS]]
! [[Canon L lens|{{shy|L-se|ries}}]]
! [[Diffractive optics|DO]]
! Filter size
|-
| [[Canon EF 14mm lens|14&nbsp;mm]]
| {{f/}}2.8
|1991
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| gel
|-
| 14&nbsp;mm II
| {{f/}}2.8
|2007
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| gel
|-
| [[Canon EF 15mm lens|15&nbsp;mm]] <br />([[Fisheye lens|fisheye]])
| {{f/}}2.8
|1987
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|{{No}}
| gel
|-
| [[Canon EF 20mm lens|20&nbsp;mm]]
| {{f/}}2.8
|1992
|{{No}}
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
| 72&nbsp;mm
|-
| [[Canon EF 24mm lens|24&nbsp;mm]]
| {{f/}}1.4
|1997
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 77&nbsp;mm
|-
| 24&nbsp;mm II
| {{f/}}1.4
|2008
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 77&nbsp;mm
|-
| 24&nbsp;mm
| {{f/}}2.8
|1988
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|{{No}}
| 58&nbsp;mm
|-
| 24&nbsp;mm IS
| {{f/}}2.8
|2012
|{{No}}
|{{Yes}}
|{{Yes}}
|{{No}}
|{{No}}
| 58&nbsp;mm
|-
| [[Canon EF 28mm lens|28&nbsp;mm]]
| {{f/}}1.8
|1995
|{{No}}
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
| 58&nbsp;mm
|-
| 28&nbsp;mm
| {{f/}}2.8
|1987
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|{{No}}
| 52&nbsp;mm
|-
| 28&nbsp;mm IS
| {{f/}}2.8
|2012
|{{No}}
|{{Yes}}
|{{Yes}}
|{{No}}
|{{No}}
| 58&nbsp;mm
|-
| [[Canon EF 35mm lens|35&nbsp;mm]]
| {{f/}}1.4
|1998
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 72&nbsp;mm
|-
| 35&nbsp;mm II
| {{f/}}1.4
|2015
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 72&nbsp;mm
|-
| 35&nbsp;mm
| {{f/}}2
|1990
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|{{No}}
| 52&nbsp;mm
|-
| 35&nbsp;mm IS
| {{f/}}2
|2012
|{{No}}
|{{Yes}}
|{{Yes}}
|{{No}}
|{{No}}
| 67&nbsp;mm
|-
| [[Canon EF 40mm lens|40&nbsp;mm STM]]
| {{f/}}2.8
|2012
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|{{No}}
| 52&nbsp;mm
|-
| [[Canon EF 50mm lens|50&nbsp;mm]]
| {{f/}}1
|1989
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 72&nbsp;mm
|-
| 50&nbsp;mm
| {{f/}}1.2
|2006
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 72&nbsp;mm
|-
| 50&nbsp;mm
| {{f/}}1.4
|1993
|{{No}}
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
| 58&nbsp;mm
|-
| 50&nbsp;mm
| {{f/}}1.8
|1987
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|{{No}}
| 52&nbsp;mm
|-
| 50&nbsp;mm II
| {{f/}}1.8
|1990
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|{{No}}
| 52&nbsp;mm
|-
| 50&nbsp;mm STM
| {{f/}}1.8
| 2015
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| 49&nbsp;mm
|-
| 50&nbsp;mm
| {{f/}}2.5
|1987
|{{Yes}}<ref group=lower-alpha>0.5× magnification only. When paired with the "Life-Size Converter EF", a separate accessory, the lens provides up to 1.0× magnification but at the loss of infinity focus.</ref>
|{{No}}
|{{No}}
|{{No}}
|{{No}}
| 52&nbsp;mm
|-
| [[Canon EF 85mm lens|85&nbsp;mm]]
| {{f/}}1.2
|1989
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 72&nbsp;mm
|-
| 85&nbsp;mm II
| {{f/}}1.2
|2006
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 72&nbsp;mm
|-
| 85&nbsp;mm IS<ref>{{cite press release |url=https://www.usa.canon.com/internet/portal/us/home/about/newsroom/press-releases/press-release-details/2017/20170829-Lens/20170829-Lens |title=Canon U.S.A. Expands Its Lens Portfolio with the New EF 85mm F/1.4L IS USM Lens And Their First-Ever Macro Tilt-Shift Lenses |publisher=Canon U.S.A., Inc. |date=29 August 2017 |access-date=30 August 2017 |archive-date=29 August 2017 |archive-url=https://web.archive.org/web/20170829123200/https://www.usa.canon.com/internet/portal/us/home/about/newsroom/press-releases/press-release-details/2017/20170829-Lens/20170829-Lens |url-status=dead }}</ref>
| {{f/}}1.4
|2017
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 77&nbsp;mm
|-
| 85&nbsp;mm
| {{f/}}1.8
|1992
|{{No}}
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
| 58&nbsp;mm
|-
| [[Canon EF 100mm lens|100&nbsp;mm]]
| {{f/}}2
|1991
|{{No}}
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
| 58&nbsp;mm
|-
| |100&nbsp;mm
| {{f/}}2.8
|1990
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|{{No}}
| 52&nbsp;mm
|-
| 100&nbsp;mm
| {{f/}}2.8
|2000
|{{Yes}}
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
| 58&nbsp;mm
|-
| 100&nbsp;mm
| {{f/}}2.8
|2009
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 67&nbsp;mm
|-
| [[Canon EF 135mm f/2 L USM lens|135&nbsp;mm]]
| {{f/}}2
|1996
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 72&nbsp;mm
|-
| 135&nbsp;mm <br />Soft&nbsp;Focus
| {{f/}}2.8
|1987
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|{{No}}
| 52&nbsp;mm
|-
| [[Canon EF 180mm f/3.5L Macro USM lens|180&nbsp;mm]]
| {{f/}}3.5
|1996
|{{Yes}}
|{{No}}
|{{No}}
|{{Yes}}
|{{No}}
| 72&nbsp;mm
|-
| [[Canon EF 200mm lens|200&nbsp;mm]]
| {{f/}}1.8
|1988
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 48&nbsp;mm rear
|-
| 200&nbsp;mm
| {{f/}}2
|2008
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| 200&nbsp;mm
| {{f/}}2.8
|1991
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 72&nbsp;mm
|-
| 200&nbsp;mm II
| {{f/}}2.8
|1996
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 72&nbsp;mm
|-
| [[Canon EF 300mm lens#The 300mm f/1.8|300&nbsp;mm]]
| {{f/}}1.8
|{{shy|Un|known}}
|{{dunno}}
|{{Yes}}
|{{dunno}}
|{{Yes}}
|{{dunno}}
|{{shy|Un|known}}
|-
| [[Canon EF 300mm lens|300&nbsp;mm]]
| {{f/}}2.8
|1987
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 48&nbsp;mm rear
|-
| 300&nbsp;mm IS
| {{f/}}2.8
|1999
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| 300&nbsp;mm IS II
| {{f/}}2.8
|2010
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| 300&nbsp;mm
| {{f/}}4
|1991
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 77&nbsp;mm
|-
| 300&nbsp;mm IS
| {{f/}}4
|1997
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 77&nbsp;mm
|-
| [[Canon EF 400mm lens|400&nbsp;mm]]
| {{f/}}2.8
|1991
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 48&nbsp;mm rear
|-
| 400&nbsp;mm II
| {{f/}}2.8
|1996
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 48&nbsp;mm rear
|-
| 400&nbsp;mm IS
| {{f/}}2.8
|1999
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| 400&nbsp;mm IS II
| {{f/}}2.8
|2011
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| 400&nbsp;mm IS III
| {{f/}}2.8
|2018
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| 400&nbsp;mm
| {{f/}}4
|2001
|{{No}}
|{{Yes}}
|{{Yes}}
|{{No}}
|{{Yes}}
| 52&nbsp;mm rear
|-
| 400&nbsp;mm II
| {{f/}}4
|2014
|{{No}}
|{{Yes}}
|{{Yes}}
|{{No}}
|{{Yes}}
| 52&nbsp;mm rear
|-
| 400&nbsp;mm
| {{f/}}5.6
|1993
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 77&nbsp;mm
|-
| [[Canon EF 500mm lens|500&nbsp;mm]]
| {{f/}}4.5
|1992
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 48&nbsp;mm rear
|-
| 500&nbsp;mm IS
| {{f/}}4
|1999
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| 500&nbsp;mm IS II
| {{f/}}4
|2011
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| [[Canon EF 600mm lens|600&nbsp;mm]]
| {{f/}}4
|1988
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 48&nbsp;mm rear
|-
| 600&nbsp;mm IS
| {{f/}}4
|1999
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| 600&nbsp;mm IS II
| {{f/}}4
|2011
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| 600&nbsp;mm IS III
| {{f/}}4
|2018
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| [[Canon EF 800mm lens|800&nbsp;mm]]
| {{f/}}5.6
|2008
|{{No}}
|{{Yes}}
|{{Yes}}
|{{Yes}}
|{{No}}
| 52&nbsp;mm rear
|-
| [[Canon EF 1200mm lens|1200&nbsp;mm]]
| {{f/}}5.6
|1993
|{{No}}
|{{Yes}}
|{{No}}
|{{Yes}}
|{{No}}
| 48&nbsp;mm rear
|}
{{reflist|group=lower-alpha}}

== Exceptions ==
Canon has two further types of lenses compatible with the EF mount: Tilt-shift and the [[Canon MP-E 65mm f/2.8 1-5x Macro lens|1-5x Macro lens]], which are not designated EF, but TS-E and MP-E respectively.  TS stands for Tilt-shift while MP stands for macro-photo.  These types of lenses are not designated EF as they are manual-focus only lenses. They do, however, retain electronic aperture control as well as focus confirmation.

=== Special ===
{| class="wikitable sortable" style="text-align:center"
|- "
! [[Focal length]]
! [[Aperture|{{shy|Ap|er|tu|re}}]]
! {{shy|In|tro|duct|ion}}
! [[Macro photography|Macro]]
! [[Ultrasonic motor|USM]]
! [[Image stabilization|IS]]
! [[Canon L lens|{{shy|L-se|ries}}]]
! [[Tilt–shift photography|Tilt–Shift]]
! Filter size
|-
|[[Canon TS-E 17mm lens|TS-E 17&nbsp;mm]]
|{{f/}}4.0
|2009
|{{No}}
|{{No}}
|{{No}}
|{{Yes}}
|{{Yes}}
|none
|-
|[[Canon TS-E 24mm lens|TS-E 24&nbsp;mm]]
|{{f/}}3.5
|1991
|{{No}}
|{{No}}
|{{No}}
|{{Yes}}
|{{Yes}}
|72&nbsp;mm
|-
|TS-E 24&nbsp;mm II
|{{f/}}3.5
|2009
|{{No}}
|{{No}}
|{{No}}
|{{Yes}}
|{{Yes}}
|82&nbsp;mm
|-
|[[Canon TS-E 45mm lens|TS-E 45&nbsp;mm]]
|{{f/}}2.8
|1991
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|{{Yes}}
|72&nbsp;mm
|-
|[[Canon TS-E 50mm lens|TS-E 50&nbsp;mm MACRO]]
|{{f/}}2.8
|2017
|{{Yes}}
|{{No}}
|{{No}}
|{{Yes}}
|{{Yes}}
|77&nbsp;mm
|-
|[[Canon MP-E 65mm f/2.8 1–5x Macro|MP-E 65&nbsp;mm Macro]]
|{{f/}}2.8
|1999
|{{Yes}}
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|58&nbsp;mm
|-
|[[Canon TS-E 90mm lens|TS-E 90&nbsp;mm]]
|{{f/}}2.8
|1991
|{{No}}
|{{No}}
|{{No}}
|{{No}}
|{{Yes}}
|58&nbsp;mm
|-
|TS-E 90&nbsp;mm Macro
|{{f/}}2.8
|2017
|{{Yes}}
|{{No}}
|{{No}}
|{{Yes}}
|{{Yes}}
|77&nbsp;mm
|-
|[[Canon TS-E 135mm lens|TS-E 135&nbsp;mm MACRO]]
|{{f/}}4.0
|2017
|{{Yes}}
|{{No}}
|{{No}}
|{{Yes}}
|{{Yes}}
|82&nbsp;mm
|}

== See also ==
* [[Canon FD lens mount]]
* [[Canon EF-S lens mount]]
* [[Canon EF-M lens mount]]
* [[Canon RF lens mount]]

== Notes ==
{{Reflist}}

== References ==
* Markerink, Willem-Jan. ''[https://archive.today/20080509074602/http://www.a1internet.nl/phomepag/markerink/mounts.htm Camera Mounts & Registers]''.  Retrieved on 6 November 2005.
* tiffen.com. ''[http://www.tiffen.com/canon_lens_to_filter_chart.html Lens To Filter Chart]''.  For list of filter sizes.

== External links ==
* [http://global.canon/en/c-museum/series_search.html?t=lens&s=ef EF Lenses at the Canon Camera Museum] {{Webarchive|url=https://web.archive.org/web/20170505082457/http://global.canon/en/c-museum/series_search.html?t=lens&s=ef |date=5 May 2017 }}
* [https://docs.google.com/spreadsheets/d/1XHrXeijkKB_ULZxcgJK_v4iPBbxAfOuuo-VuP5ESDvA/edit#gid=0 List of all Canon SLR lenses with technical specifications]

{{Canon EF Mount prime lenses timeline}}
{{Canon EF Mount zoom lenses timeline}}
{{Canon EF lenses}}
{{Table of Canon SLR}}
{{Canon EOS digital cameras|state=autocollapse}}
{{Canon EOS Cinema cameras|state=autocollapse}}
{{Canon}}

{{DEFAULTSORT:Canon Ef Lens Mount}}
[[Category:Canon EF lenses| ]]
[[Category:Lens mounts]]