# Canon EF-M lens mount

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 systems for mirrorless cameras, the other being the RF mount.
The M system has an 18 mm flange focal distance (compared to 20 mm for RF and 44 mm for EF and EF-S) and a 47 mm throat diameter (compared to 54 mm for EF, EF-S, and RF). As it is designed for use with an APS-C-sized image sensor, it features the same crop factor (of roughly 1.6) as the existing EF-S lens mount.
The M system is somewhat limited as Canon has issued relatively few native lenses, listed below. There is a lack of native lenses with a large aperture, the exceptions being 22 mm f/2.0 and 32 mm f/1.4. In 2014, third party manufacturers started to present their M lenses. In addition, it is possible to use Canon EF and EF-S lenses (made for the Canon DSLRs) with an adapter. This solution reportedly works well also with regard to the autofocus, but it takes away the size advantage of the smaller M system. Suitable adapters (from EF to M or from EF-S to M) are made by Canon as well as third party manufacturers. As is common with mirrorless systems, the adapter solution is not backwards-compatible with Canon's DSLR cameras: this means that you cannot put M lenses on a non-M DSLR.
The EOS EF-M system was discontinued in October 2023.

## Compatibility

The cameras that can use the EF-M mount are:
| Camera | Sensor | Maximum Resolution | Autofocus System | Shutter Speeds | Continuous Shooting | Date Introduced | Weight |
| EOS M | 22.3 × 14.9 mm CMOS (APS-C type) | 18 Mp (5184 × 3456) | Hybrid CMOS AF | 30 s to 1/4000 s and bulb | 4.3 fps | 2012-06 | 262 g (9.2 oz) |
| EOS M2 | 22.3 × 14.9 mm CMOS (APS-C type) | 18 Mp (5184 × 3456) | Hybrid CMOS AF | 30 s to 1/4000 s and bulb | 3.4 fps | 2013-12 | 274 g (9.7 oz) including battery |
| EOS M3 | 22.3 × 14.9 mm CMOS (APS-C type) | 24 MP (6000 × 4000) | Hybrid CMOS AF III | 1/4000s to 30 s | 4.2 fps | 2015-02-06 | 366 g (12.9 oz) including battery |
| EOS M5 | 22.3 × 14.9 mm CMOS (APS-C type) | 24 MP (6000 × 4000) | Dual-Pixel CMOS AF | 30 s to 1/4000 s | 9 fps; 7 fps with autofocus | 2016-09-15 | 427 g (15.1 oz) |
| EOS M6 | 22.3 × 14.9 mm CMOS (APS-C type) | 24 MP (6000 × 4000) | Dual-Pixel CMOS AF | 30 s to 1/4000 s | 9 fps; 7 fps with autofocus | 2017-02-14 | 390 g (13.8 oz) |
| EOS M6 Mark II | 22.3 × 14.9 mm CMOS (APS-C type) | 32 MP (6960 × 4640) | Dual-Pixel CMOS AF | 30 s to 1/4000 s; electronic 1/16000 s | 14 fps with autofocus | 2019-08-28 | 408 g (14.4 oz) |
| EOS M10 | 22.3 × 14.9 mm CMOS (APS-C type) | 18 Mp (5184 × 3456) | Hybrid CMOS AF II | 30 s to 1/4000 s | 4.6 frames per second | 2015-10-13 | 301 g (10.6 oz) including battery |
| EOS M50 | 22.3 × 14.9 mm CMOS (APS-C type) | 24 MP (6000 × 4000) | Dual-Pixel CMOS AF | 30 s to 1/4000 s | 10 fps; 7.4 fps with autofocus | 2018-03-23 | 387 g (13.7 oz) |
| EOS M50 Mark II | 22.3 × 14.9 mm CMOS (APS-C type) | 24 MP (6000 × 4000) | Dual-Pixel CMOS AF | 30 s to 1/4000 s | 10 fps; 7.4 fps with autofocus | 2020-10-14 | 387 g (13.7 oz) |
| EOS M100 | 22.3 × 14.9 mm CMOS (APS-C type) | 24 MP (6000 × 4000) | Dual-Pixel CMOS AF | 30 s to 1/4000 s | 6.1 fps; 4 fps with autofocus | 2017-08-29 | 302 g (10.7 oz) including battery |
| EOS M200 | 22.3 × 14.9 mm CMOS (APS-C type) | 24 MP (6000 × 4000) | Dual-Pixel CMOS AF | 30 s to 1/4000 s | 6.1 fps; 4 fps with autofocus | 2019-09-25 | 299 g (10.6 oz) including battery |

## List of EF-M lenses from Canon

| Focal length | Equivalent focal length (×1.6 crop factor) | Aperture range | Introduced | Macro | USM | STM | IS | L-series | DO | Min focusing distance | Filter size | Lens diameter | Lens length | Weight |
| 11–22 mm | 18 – 35 mm | f/4 – 5.6 | 2013 | No | No | Yes | Yes | No | No | 0.15m/0.5ft | 55 mm | 60.9 mm | 58.2 mm | 220 g |
| 15–45 mm | 24 – 72 mm | f/3.5 – 6.3 | 2015 | No | No | Yes | Yes | No | No | 0.25m/0.8ft | 49 mm | 60.9 mm | 44.5 mm | 130 g |
| 18–55 mm | 29 – 88 mm | f/3.5 – 5.6 | 2012 | No | No | Yes | Yes | No | No | 0.25m | 52 mm | 60.9 mm | 61.0 mm | 210 g |
| 18–150 mm | 29 – 240 mm | f/3.5 – 6.3 | 2016 | No | No | Yes | Yes | No | No | 0.45m/1.5ft | 55 mm | 60.9 mm | 86.5 mm | 300 g |
| 55–200 mm | 88 – 320 mm | f/4.5 – 6.3 | 2014 | No | No | Yes | Yes | No | No | 1.0m/3.3ft | 52 mm | 60.9 mm | 86.5 mm | 260 g |
| 22 mm | 35 mm | f/2 | 2012 | No | No | Yes | No | No | No | 0.15m/0.49ft | 43 mm | 60.9 mm | 23.7 mm | 105 g |
| 28 mm | 45 mm | f/3.5 | 2016 | Yes | No | Yes | Yes | No | No | 0.097m (1:1), 0.093m (1.2:1) | 43 mm | 60.9 mm | 45.5 mm | 130 g |
| 32 mm | 51 mm | f/1.4 | 2018 | No | No | Yes | No | No | No | 0.23m/0.76ft | 43 mm | 60.9 mm | 56.5 mm | 235 g |

## List of EF-M lenses from 3rd-party (AF only)

| Manufacturer | Focal length | Equivalent focal length (×1.6 crop factor) | Aperture range | Introduced | Filter size |
| Tamron | 18 – 200 mm | 29 – 320 mm | f/3.5 – 6.3 | 2014 | 55 mm |
| Sigma | 16 mm | 26 mm | f/1.4 | 2019 | 67 mm |
| Sigma | 30 mm | 48 mm | f/1.4 | 2019 | 52 mm |
| Sigma | 56 mm | 90 mm | f/1.4 | 2019 | 55 mm |
| Viltrox | 23 mm | 37 mm | f/1.4 | 2020 | 52 mm |
| Viltrox | 33 mm | 53 mm | f/1.4 | 2020 | 52 mm |
| Viltrox | 56 mm | 90 mm | f/1.4 | 2020 | 52 mm |

## Images

* Mount Adapter EF-EOS M
* EF-M 11–22 mm f/4–5.6 IS STM
* EF-M 15–45 mm f/3.5–6.3 IS STM mounted on an EOS M6
* EF-M 18–55 mm f/3.5–5.6 IS STM
* EF-M 18–150 mm f/3.5–6.3 IS STM mounted at an EOS M5
* EF-M 55–200 mm f/4.5–6.3 IS STM
* EF-M 22 mm f/2 STM