The new mount converter enhancing
the extensibility of the L-Mount system.

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, enhancing the extensibility of the L-Mount system.

Features

Effective use of lens investment

* SIGMA’s CANON EF mount compatible lens

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.

44 interchangeable 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 44 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.

Simple interface

Green light: the lens is compatible

Orange light:the lens is compatible but requires firmware update

Not lighting up: the lens is not compatible

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

Fast and accurate auto focus

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

Note: Not compatible with AF-C mode.

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.

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 tool supplied makes attaching/detaching possible.

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.

Notes

Notice on usage of the SIGMA Mount Converter MC-21 when it is used in combination with Panasonic L-Mount cameras.

  • The SIGMA MC-21 can be used with the Panasonic LUMIX S1, LUMIX S1R, LUMIX S1H and LUMIX S5. Please update the firmware of the MC-21 and the camera to the latest version.
  • Only AF-S works in Autofocus Mode. AF-C cannot be selected.
  • The Auto continuous operation cannot be used during video shooting.
  • Touch AF cannot be used.
  • With lenses incorporating MO (Manual Override), operation in manual mode is possible only after focusing.
  • MF guide is not available.

Notice on usage of the SIGMA Mount Converter MC-21 when it is used in combination with Leica cameras.

  • The SIGMA MC-21 can be used with the Leica SL2 and SL2-S. Please update the firmware of the MC-21 and the camera to the latest version.
  • The SIGMA MC-21 cannot be used with Leica cameras (Leica T, TL, TL2, CL, SL) released before the announcement of the L-Mount Alliance.
  • Only AF-S works in Autofocus Mode. AF-C cannot be selected.
  • Only MF can be used for focusing during video shooting.
  • With lenses incorporating MO (Manual Override), operation in manual mode is possible only after focusing.
  • MF guide is not available.
  • The Optical Stabilizer function can be switched ON and OFF only by using the OS switch on the lens body.
  • The AF Function button available on some lenses cannot be used.

Product Lineup

MOUNT CONVERTER MC-21

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.

  • SIGMA SA-L
    SIGMA SA-mount

    Barcode No.
    00-85126-93724-9
  • CANON EF-L
    Canon EF mount

    Barcode No.
    00-85126-93723-2

Accessories

Separately Sold Accessory

Catalogs / Resources

Manuals / Brochures