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Sigma MC-21 Mount Converter/Lens Adapter (Sigma EF-Mount Lenses to L-Mount Camera)

BH #SIMC21C • MFR #89E969
Sigma MC-21 Mount Converter/Lens Adapter (Sigma EF-Mount Lenses to L-Mount Camera)
Key Features
  • EF-Mount Lens to L-Mount Body
  • Integrated LED Displays Compatibility
  • Maintains Autofocus and Auto-Exposure
  • Supports In-Camera Correction Features
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.
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Sigma MC-21 Sigma EF Lenses to L-Mount Overview

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.

Compatibility
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
UPC: 085126937232

Sigma MC-21 Sigma EF Lenses to L-Mount Specs

Camera Mount
Leica L
Lens Mount
Canon EF
Tripod Mounting Thread
1/4"-20 Female
Packaging Info
Package Weight
0.7 lb
Box Dimensions (LxWxH)
7 x 4.5 x 2.5"

Sigma MC-21 Sigma EF Lenses to L-Mount Reviews

See any errors on this page? Let us know

Does this have the USB port for updating lens ...

Does this have the USB port for updating lens firmware (like the same-priced MC-11)?
Asked by: jacob
This adapter does not have a USB port for firmware updates. The firmware is updated while it is attached to the camera or to the Sigma USB dock SIUSBDL, https://bhpho.to/3hzUXFz.
Answered by: Moe
Date published: 2021-07-12

Does this work with CONTAX 645 lenses to go onto ...

Does this work with CONTAX 645 lenses to go onto Leica SL2S?
Asked by: CHINA
Sigma MC-21 Mount Converter/Lens Adapter (Sigma EF-Mount Lenses to L-Mount Camera) is for lenses with Canon EF mount made by Sigma. It won't work with Contax 645 lenses.
Answered by: Daniel C
Date published: 2022-12-06

Will this work with the sigma 18-35mm ?

Will this work with the sigma 18-35mm ?
Asked by: aaron
Yes, of course in a Canon mount.
Answered by: Rob
Date published: 2021-01-28

when is it due to be released?

when is it due to be released?
Asked by: Youngbird
BH now shows April 18th
Answered by: Tim
Date published: 2019-05-19

Is this adapter rock solid? I want a solution for ...

Is this adapter rock solid? I want a solution for my Leica R's to work with follow focus without play
Asked by: Eduardo
The Sigma MC-21 Mount Converter/Lens Adapter (Sigma EF-Mount Lenses to L-Mount Camera) is rock solid with minimal play. Leica R has a different mount than Leica L though, so this adapter won't work on Leica R.
Answered by: Daniel C
Date published: 2024-07-16

Does the adapter reduce the field of view?

Does the adapter reduce the field of view?
Asked by: Daniel
No it does not reduce the field of view.
Answered by: Michele
Date published: 2019-10-02

Will the fact that autofocus only working in AF-S ...

Will the fact that autofocus only working in AF-S mode negate the use of Phase Detection Auto Focus on S52x?
Asked by: Gary
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.
Answered by: Yaakov
Date published: 2023-05-10

Can the lenses of the Canon L line be adapted? ...

Can the lenses of the Canon L line be adapted? Like the 24-105mm II and the 85mm 1.4?
Asked by: Isaac
I contacted Sigma directly because I own a number of Canon "L" lenses and a Leica CL. Below is the response from Sigma: Thank you for contacting Sigma USA. Our MC-21 is designed for Sigma Art, Sport, and Contemporary lenses only. Unfortunately the MC-21 will not work with any of the current Leica cameras, but will with future models. Fred Langstaff | Customer support | SIGMA Corporation of America | TEL: 1-800-896-6858
Answered by: Ira
Date published: 2023-06-28
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