The MC-21 Mount Converter enables the use of Sigma EF-mount lenses on L-mount mirrorless camera bodies, and maintains full lens performance, including autofocus in AF-S mode and auto-exposure, as well as in-camera correction and image stabilization technologies. An integrated LED can be used to display select Sigma lens compatibility with the adapted camera body, and the adapter also has pre-loaded lens data to support peripheral illumination, chromatic aberration, and distortion corrective functions. In order to maintain a high degree of image quality, the interior of the adapter is flocked to reduce reflections, and it also retains full EXIF data to benefit post-production and file management. Additionally, a removable tripod mount is included for more stable mounting when working with heavier lenses.

Per Sigma, this Mount Converter/Lens Adapter is compatible with a select number of Sigma's own EF-mount lenses, and may or may not be suitable for use with other manufacturers' EF-mount lenses.

EF-Mount Lens to L-Mount Body    Integrated LED Displays Compatibility    Maintains Autofocus and Auto-Exposure    Supports In-Camera Correction Features    Flocked Interior Reduces Reflections    Removable Tripod Mount    Retains EXIF Data

Cameras
Panasonic S1R
Panasonic S1


Lenses
12-24mm f/4 DG HSM Art
14-24mm f/2.8 DG HSM Art
24-35mm f/2 DG HSM Art
24-70mm f/2.8 DG OS HSM Art
24-105mm f/4 DG OS HSM Art
60-600mm f/4.5-6.3 DG OS HSM Sports
70-200mm f/2.8 DG OS HSM Sports
100-400mm f/5-6.3 DG OS HSM Contemporary
120-300mm f/2.8 DG OS HSM Sports
150-600mm f/5-6.3 DG OS HSM Sports
150-600mm f/5-6.3 DG OS HSM Contemporary
14mm f/1.8 DG HSM Art
20mm f/1.4 DG HSM Art
24mm f/1.4 DG HSM Art
28mm f/1.4 DG HSM Art
35mm f/1.4 DG HSM Art
40mm f/1.4 DG HSM Art
50mm f/1.4 DG HSM Art
70mm f/2.8 DG Macro Art
85mm f/1.4 DG HSM Art
105mm f/1.4 DG HSM Art
135mm f/1.8 DG HSM Art
500mm f/4 DG OS HSM Sports
17-70mm f/2.8-4 DC Macro OS HSM Contemporary
18-35mm f/1.8 DC HSM Art
18-200mm f/3.5-6.3 DC Macro OS HSM Contemporary
18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary
50-100mm f/1.8 DC HSM Art
30mm f/1.4 DC HSM Art

Related Questions and Answers

Q: 1. Does the Autofocus Continuous work with this adapter and the LUMIX S5ii?

A: The Sigma MC-21 Mount Converter/Lens Adapter (Sigma EF-Mount Lenses to L-Mount Camera) has integrated electronic contacts to maintain autofocus capabilities with the lens and the camera.

Q: 2. Will this work on a sigma FP with the Sigma efs 17 - 50 F 2.8 lens?

A: The Sigma MC-21 is compatible with the Sigma 17-50mm Canon EF mount lens. However, the 17-50mm is a crop sensor lens and the Sigma FP is a full frame camera. The camera would need to be set to crop mode (lower res setting) or vignetting may occur.

Q: 3. I have a Sigma fp and a lot of Sony E mount full frame lenses. Is this the correct adapter so I can use my Sony FE lenses with my Sigma fp?

A: No. This adapter is not for Sony E mount lenses.

Q: 4. Will the fact that autofocus only working in AF-S mode negate the use of Phase Detection Auto Focus on S52x?

A: The Sigma MC-21 Mount Converter/Lens Adapter (Sigma EF-Mount Lenses to L-Mount Camera) would work with phase detection auto focus on the Panasonic Lumix S5 IIX Mirrorless Camera. Phase Detection is not specifically linked to continuous auto focus, and will work in single auto focus as well.

Q: 5. Can the lenses of the Canon L line be adapted? Like the 24-105mm II and the 85mm 1.4?

A: The Sigma MC-21 Mount Converter/Lens Adapter (Sigma EF-Mount Lenses to Leica L) adapts EF-Mount Lenses to an L-Mount Body. Both the Canon EF 24-105mm f/4L IS II USM Lens and the Canon EF 85mm f/1.4L IS USM Lens are EF mount lenses and thus qualify.

Q: 6. Will this adapter maintain weather sealing between lens and body?

A: Yes, it has some weather sealing.

Q: 7. Will this adapter allow Canon EF lenses to shoot wide open at f/1.2 on L mount bodies? The Sigma MC-11 and Metabones adapters don't support f/1.2 on Sony E mount cameras, maxing out at f/1.3

A: Unfortunately, Sigma doesn’t support the use of Canon brand EF lenses on the MC-21. That being said, your results may vary when using them with the MC-21.

Q: 8. If I use a Sigma art 24-70 EF with this adapter, will the autofocus mode work while I am recording?

A: Continuous AF would not be available, but rather Single AF.

Q: 9. I'm looking for an adapter to do the opposite of this. I'd like to adapt my new Sigma L Mount lenses to a Canon EF body. Does such an adapter exist?

A: I'm sorry but that adapter does not exist, flange to sensor distance does not allow for it.

Q: 10. I have a leica SL, SL2, SL2-S. And I want to adapt the zeiss outs 100mm 1.4 Canon EF mount. I know the lens is manual focus, will the adapter let me change apertures?

A: The aperture can be adjusted via the camera body.