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Sigma MC-21 EF / SA To L-Mount Adapter Announced

Sigma Mount Converter MC-21 announced to convert Sigma SA and Canon EF lenses to L-Mount, for use on L-Mount cameras.

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Sigma Mount Converter MC-21


Sigma has announced a new Sigma Mount Converter, the MC-21, which is available to convert Canon EF or Sigma SA lenses to L-Mount, for use on L-Mount cameras including the new Panasonic Lumix S1 / S1R, and Leica SL.

Sigma has also just announced 11 Sigma L-Mount lenses, so you may not need the adapter. Sigma also offer a lens mount conversion service.


Pricing & Availability: 

  • EF-L For Sigma, Canon EF Mount Lenses SRP £249.99
  • SA-L For Sigma SA Mount Lenses SRP £99.
  • Delivery scheduled from the end of April 2019.



From Sigma: The SIGMA MOUNT CONVERTER MC-21 allows SIGMA SA mount and SIGMA’s CANON EF mount interchangeable lens owners to use their lens investment on L-Mount camera bodies. The converter allows more freedom of choice for L-Mount cameras from SIGMA, Leica Camera and Panasonic, enhancing the extensibility of the L-Mount system.


Effective use of lens investment

Attaching the MC-21 to your collection of SIGMA SA mount and SIGMA’s CANON EF mount compatible lenses* allows them to be used as L-Mount system lenses, promoting the effective use of valuable lenses already owned.

* See the list of compatible lenses below.


29 interchangeable (Sigma) lenses available to be used for L-Mount cameras

The MC-21 increases the number of interchangeable lenses manufactured by SIGMA that can be used with the L-Mount system by 29 lenses. Compatible with the autocrop function, mounting APS-C size image circle DC lenses to a camera body equipped with a 35mm full size sensor still allows immediate use for shooting.

Sensor Product
35mm full-frame

12-24mm F4 DG HSM | Art
14-24mm F2.8 DG HSM | Art
24-35mm F2 DG HSM | Art
24-70mm F2.8 DG OS HSM | Art
24-105mm F4 DG OS HSM | Art
60-600mm F4.5-6.3 DG OS HSM | Sports
70-200mm F2.8 DG OS HSM | Sports
100-400mm F5-6.3 DG OS HSM | Contemporary
120-300mm F2.8 DG OS HSM | Sports
150-600mm F5-6.3 DG OS HSM | Sports
150-600mm F5-6.3 DG OS HSM | Contemporary
14mm F1.8 DG HSM | Art*
20mm F1.4 DG HSM | Art*
24mm F1.4 DG HSM | Art*
28mm F1.4 DG HSM | Art*
35mm F1.4 DG HSM | Art*
40mm F1.4 DG HSM | Art*
50mm F1.4 DG HSM | Art*
70mm F2.8 DG MACRO | Art*
85mm F1.4 DG HSM | Art*
105mm F1.4 DG HSM | Art*
135mm F1.8 DG HSM | Art*
500mm F4 DG OS HSM | Sports


17-70mm F2.8-4 DC MACRO OS HSM | Contemporary
18-35mm F1.8 DC HSM | Art
18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary
18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary
50-100mm F1.8 DC HSM | Art
30mm F1.4 DC HSM | Art

*The MC-21 is not necessary for native L-Mount lenses.

  • Cannot be used in combination with teleconverter.
  • Operations using other non-compatible lenses are not guaranteed.


Fast and accurate auto focus

High precision AF photography in AF-S mode is achieved.

* Not compatible with AF-C mode.


Simple interface

Whether the mounted lens is compatible or not is instantly visible from the color and the on/off of the MC-21's built-in LED. The LED also notifies the user when a lens firmware update is available.


Lens data is pre-loaded

Running the data pre-loaded in the MC-21 for each lens by the special control program, autofocus and aperture control have been optimized. Regarding lenses to be released in the future, data for operating these lenses via the MC-21 will be stored in the lens. It means no firmware updates of the MC-21 will be required to use those new lenses. In addition, the MC-21 also supports correction functions of camera such as peripheral illumination, chromatic aberration of magnification, and distortion.


Other features

  • Comes with a tripod socket - Equipped with a socket for attaching the tripod. Lenses not equipped with a tripod socket can be used by mounting the tripod to the MC-21.
  • The inside surface of the barrel is covered with flocking to eliminate internal reflections - To prevent a reduction in lens performance due to internal reflections, the inside surface of the barrel is covered with flocking.
  • Inclusion in Exif data - Information such as lens type, focal length, F number, and other tags are embedded as Exif data in each image file.


Available AF mounts: CANON EF-L, SIGMA SA-L

Appearance and specifications are subject to change without notice.


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