The Neewer EF/EF-S Lens to EOS M Camera Lens Mount Adapter enables you to use your Canon EF and EF-S lenses with the Canon EOS M mirrorless digital camera system, which uses an EF-M lens mount. It is fully compatible with all lens functions, including image stabilization, electronic aperture control, and autofocus. A tripod adapter is provided for reducing strain on the camera when using heavier lenses. This mount can be removed for using longer telephoto lenses that feature their own tripod collar. And, included with the adapter are front and rear caps for storage.

Mount Canon EF/EF-S Lens on EOS M Camera    Retains Automatic Lens Functions    Removable Tripod Mount

Canon EOS M, M3

Related Questions and Answers

Q: 1. Is the adapter tight fit or loose and can jiggle?

A: This adapter fits well without any movement.

Q: 2. Would this work on Canon M50 Mark ii with a Sigma 55-200mm lens?

A: Yes, the Viltrox EF-EOS M Lens Mount Adapter for Canon EF or EF-S-Mount Lens to Canon EF-M-Mount Camera will work with the Canon EOS M50 Mark II Mirrorless Camera (B&H # CAEM502B), though using the Sigma Zoom Normal-Telephoto 55-200mm f/4-5.6 DC Autofocus Lens for Canon Digital EOS (B&H # SI5520045CAF) may cause the edges of the image to vignette.

Q: 3. If I use a sigma 24 -70mm will it be the exact same and will there be any visible vignetting on the edges of the frame?

A: Since the Sigma 24-70mm f/2.8 DG OS HSM Art Lens for Canon EF is a full-frame lens, when using it with the Viltrox EF-EOS M2 0.71x Lens Mount Adapter for Canon EF-Mount Lens to Canon EF-M-Mount APS-C Camera, it would project an image larger than the camera's APS-C sized sensor was built to accept. Therefore, you will not get any vignetting, and you will get a one-stop increase for the camera over the lens' aperture range.

Q: 4. Can this help with the crop effect created by the sigma DC 30mm f1.4 contemporary lens for the canon m50? Will this speedboster be compatible with those lens mounts?

A: The Sigma 30mm is a DC lens so it was made for the crop sensors in the M50. Using a booster would cause vignetting on a Sigma DC lens.

Q: 5. Will this adapter work with 3rd company lenses for Canon...Tamron, Sigma, etc.?

A: Yes, under the Neewer EF to EF-EOS R Mount Adapter, following the 'compatibility' tab, there is a list of compatible lenses.

Q: 6. When used with the Canon M50 body and Canon EF 50mm lens, does the auto focus function work?

A: The Viltrox EF-EOS M Lens Mount Adapter listed above has electronic contacts built into the lens adapter which supports electronic communication between camera and lens to enable autofocus with the Canon EF 50mm f/1.8 STM Lens, B&H # CA5018EFSTM, the Canon EF 50mm f/1.4 USM Lens, B&H # CA5014EF, and the Canon EF 50mm f/1.2L USM Lens, B&H # CA5012LEF.

Q: 7. Ef-s compatible?

A: Unfortunately, the Neewer EF Lens to EOS-M Speed Booster 0.71x Mount Adapter does not accept EF-S lenses.

Q: 8. Is this a speed booster

A: Yes. The adapter's optics help to maximize the connected lens's apparent angle of view while providing a one-stop increase for the camera over the lens's aperture range. Speed boosters provide a stop extra of light.

Q: 9. Has anyone has a problem with this installing it on the Black Magic Pocket 4k?...it doesn’t fit on it

A: It is not made for the Black Magic camera. You would need this version instead: https://bhpho.to/2MXlorM

Q: 10. Can this work on Canon M50 ? And I purchased an EFS 18-135mm lens.. hope I can still use the adapter?

A: The Viltrox EF-EOS M Lens Mount Adapter for Canon EF or EF-S-Mount Lens to Canon EF-M-Mount Camera will allow you to use the Canon EF-S 18-135mm f/3.5-5.6 IS USM Lens on the Canon EOS M50 Mirrorless Camera.