Sigma MOUNT CONVERTER MC-11 (SA-E)

Sigma MOUNT CONVERTER MC-11 (SA-E) firmware

Sigma · MOUNT CONVERTER MC-11 (SA-E) · Lens

Latest firmware for the Sigma MOUNT CONVERTER MC-11 (SA-E) is v1.28 (August 27, 2026).

Changelog

MOUNT CONVERTER MC-11 (SA-E) firmware changelog

  1. v1.27 v1.28

  2. v1.26 v1.27 Fixed manual focus assist and autofocus issues when using lenses with manual override enabled.

  3. v1.25 v1.26

  4. v1.24 v1.25

  5. v1.23 v1.24 Adds support for 120-300mm lens and fixes occasional blinking during video.

  6. v1.22 v1.23 Refined peripheral illumination correction for SIGMA 24-105mm F4 DG OS HSM Art.

  7. v1.21 v1.22 Enables compatibility with four Sigma Art lenses and requires updated Optimization Pro software.

  8. v1.20 v1.21 Adds compatibility with four Sigma lenses.

  9. v1.19 v1.20 Adds compatibility with four SA-mount lenses.

  10. v1.18 v1.19 Added compatibility with three additional SA-mount lenses.

Firmware history

  1. Version 1.28 Latest Released Aug 27, 2026 First seen Aug 28, 2026
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    Fixed an i​ssue where a release time lag occurs under specific settings duri​ng flash photography.

    Release notes & download
  2. Version 1.27 Released Aug 25, 2022 First seen Jul 5, 2026

    Fixed manual focus assist and autofocus issues when using lenses with manual override enabled. — summary by updatemystuff.com

    Show release notes

    Fixed a problem in which the MF assist function would not work in rare cases when a lens with the MF switching funct​ion (Manual Override) enabled, or a lens with the focus mode switch set to MO was attached.

    Fixed a problem in which the AF would not work in rare cases when the focus ring was turned during video recor​ding in AF mode with a lens which has the MF switching function (manual override) enabled.

    Release notes & download
  3. Version 1.26 Released Apr 7, 2022 First seen Jul 5, 2026
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    It has impr​oved the phenomenon whereby the lens’s optical stabilizer effect differs ​depending on the shutter type and drive mode used.

    Release notes & download
  4. Version 1.25 Released Mar 25, 2021 First seen Jul 5, 2026
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    It makes the converter c​ompatible with the SIGMA 500mm F4 DG OS HSM ​| Sports in SIGMA SA mount, that has the latest firmware Ver.1.03.

    Release notes & download
  5. Version 1.24 Released Dec 17, 2020 First seen Jul 5, 2026

    Adds support for 120-300mm lens and fixes occasional blinking during video. — summary by updatemystuff.com

    Show release notes

    It makes the converter compatible with the SIGMA 120​-300mm F2.8 DG HSM | Sports in SIGMA SA mount, that has the latest firmware Ver.1.02.It has improved a rarely-occurring blinking phenomenon during movie shooting.

    Note: Please be sure to upda​te SIGMA Optimization Pro to Ver.1.6.0 or later when updating the MC-11 firmware.

    Release notes & download
  6. Version 1.23 Released Apr 23, 2020 First seen Jul 5, 2026

    Refined peripheral illumination correction for SIGMA 24-105mm F4 DG OS HSM Art. — summary by updatemystuff.com

    Show release notes

    It has optimized the peripheral illumination correction data w​hen used in combination with SIGMA 24-105mm F4 DG OS HSM | Art for SIGMA SA mount. ​Note: Before updating the SIGMA MOUNT CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.5.0 or later.

    Release notes & download
  7. Version 1.22 Released Feb 20, 2020 First seen Jul 5, 2026

    Enables compatibility with four Sigma Art lenses and requires updated Optimization Pro software. — summary by updatemystuff.com

    Show release notes

    It has become compatible with the SIGMA 28mm F1.4 DG HSM | Art for SIGMA SA mount, that has the latest firmware Ver.1.01.It has become compatib​le with the SIGMA 40mm F1.4 DG HSM | Art for SIGMA SA mount, that has the latest firmware Ver.1.01.It has become compatible with the SIGMA 70mm F2.8 DG MACRO | Art for SIGMA SA mount, that has the latest firmware Ver.1.01.It has become comp​atible with the SIGMA 105mm F1.4 DG HSM | Art for SIGMA SA mount, that has the latest firmware Ver.1.01.

    Note: Before updating the SIGMA MOUNT CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.5.0 or later.

    Release notes & download
  8. Version 1.21 Released Jan 23, 2020 First seen Jul 5, 2026

    Adds compatibility with four Sigma lenses. — summary by updatemystuff.com

    Show release notes

    It has become c​ompatible with the SIGMA 14-24mm F2.8 DG HSM | Art for SIGMA SA mount, that has the latest firmware Ver.1.01.It has become compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for SIGMA SA mount, that has the latest firmware Ver.1.04.It has become compatible with the SIGMA 85mm F1.4 DG HSM | Art for SIGMA SA mount, that ha​s the latest firmware Ver.1.03.It has become compatible with the SIGMA 500mm F４ DG OS HSM | Sports for SIGMA SA mount, that has the latest firmware Ver.1.02.

    Note: Before updating the SIGMA MOUNT CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.5.0 or later.

    Release notes & download
  9. Version 1.20 Released Dec 19, 2019 First seen Jul 5, 2026

    Adds compatibility with four SA-mount lenses. — summary by updatemystuff.com

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    It has become compatible with the SIGMA 50mm F1.4 DG HSM | Art for SIGMA SA mount, that h​as the latest firmware Ver. 1.02.It has become compatible with the SIGMA 60-600mm F4.5-6.3 DG OS HSM | Sports for SIGMA SA mount, that has the latest firmware Ver.1.01.It has become compatible with the SIGMA 150-600mm F5-6.3 DG OS HSM | Sports for SIGMA SA mount, that has the latest firmware ​Ver.1.03.It has become compatible with the SIGMA 500mm F４ DG OS HSM | Sports for SIGMA SA mount, that has the latest firmware Ver. 1.02.

    Note: Before updating the SIGMA MOUNT CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.5.0 or later.

    Release notes & download
  10. Version 1.19 Released Nov 22, 2019 First seen Jul 5, 2026

    Added compatibility with three additional SA-mount lenses. — summary by updatemystuff.com

    Show release notes

    It has become compatible with the SI​GMA 70-200mm F2.8 DG OS HSM | Sports for SIGMA SA mount, that has the latest firmware Ver.1.01.It has become compatible with the SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary for SIGMA SA mount, that has the latest firmware Ver.1.03.It has become compatible with the SIGMA 24-70mm F2.8 DG OS HSM | Art for SIGMA SA mount, that has the latest firmwar​e Ver.1.06.

    Note: Before updating the SIGMA MOUNT CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.5.0 or later.

    Release notes & download
  11. Version 1.18 Released May 23, 2019 First seen Jul 5, 2026

    Autofocus speed improved when used with Sony α9/α7 III and Sigma 135mm F1.8 Art lens. — summary by updatemystuff.com

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    It has improved the AF speed when it is used in combination with t​he SONY α9 or SONY α7 III and the SIGMA 135mm F1.8 DG HSM | Art for SIGMA. Note: F​or customers who own the SONY α9, please update the firmware of the camera to Ver.5.00 or later.

    Release notes & download
  12. Version 1.17 Released Apr 18, 2019 First seen Jul 5, 2026

    Added support for seven Sigma lenses across Art, Contemporary and Sports lines. — summary by updatemystuff.com

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    It has become compatible with the SIGMA ​12-24mm F4 DG HSM | Art for SIGMA, that has the latest firmware Ver.1.01.It has become compatible with the SIGMA 24-70mm F2.8 DG OS HSM | Art for SIGMA, that has the latest firmware Ver.1.05.It has become compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for SIGMA, that has the latest firmware Ver.1.03.It has become compatible with the SIGMA 14mm F1.8 DG HSM | Art for SIGMA, that has the latest firmware Ver.1.01.It has become compatible with the SIGMA 85mm F1.4 DG HSM | Art for SIGMA, that has the latest firmware Ver.1.02​.It has become compatible with the SIGMA 135mm F1.8 DG HSM | Art for SIGMA, that has the latest firmware Ver.1.01.It has become compatible with the SIGMA 500mm F4 DG OS HSM | Sports for SIGMA, that has the latest firmware Ver.1.01.

    Note: Before updating the SIGMA MOUNT CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.5.0 or later.

    Release notes & download
  13. Version 1.16 Released Mar 14, 2019 First seen Jul 5, 2026

    Adds support for additional lenses, improves stabilization compensation with Sony cameras, and optimizes peripheral illumination and flash… — summary by updatemystuff.com

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    It has optimized the peripheral illumination correction data when it is used in combination wit​h the SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary for SIGMA.It has become compatible with the SIGMA 24-70mm F2.8 DG OS HSM | Art for SIGMA, that has the latest firmware Ver.1.04.It has become compatible with the SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary for SIGMA, that has the latest firmware Ver.1.03.It has become compatible with the SIGMA 85mm F1.4 DG HSM | Art for SIGMA, that has the latest firmware Ver.1.01.It has improved the compensation effect when it is used in combination with the Sony α9, Sony α7III and specific lenses*, and their in-camera image stabilization adjustment is set to AUTO.

    It has been set toachieve the same effect as when it is adjusted manually.

    It has improved the accuracy of exposure when it is used with dedicated flashes manufactured by SONY.

    • Specific lensesSIGMA 17-70mm F2.8-4 DC MACRO​ OS HSM | Contemporary、SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary、SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary、SIGMA 50-100mm F1.8 DC HSM | Art、SIGMA 24-70mm F2.8 DG OS HSM | Art、SIGMA 24-105mm F4 DG OS HSM | Art、SIGMA 60-600mm F4.5-6.3 DG OS HSM | Sports、SIGMA 70-200mm F2.8 DG OS HSM | Sports、SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary、SIGMA 120-300mm F2.8 DG OS HSM | Sports、SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary、SIGMA 150-600mm F5-6.3 DG OS HSM | Sports、SIGMA 70mm F2.8 DG MACRO | Art、SIGMA 85mm F1.4 DG HSM | Art、SIGMA 105mm F1.4 DG HSM | Art、SIGMA 135mm F1.8 DG HSM | Art、SIGMA 500mm F4 DG OS HSM | Sports Note: Before updating the SIGMA MOUNT CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.5.0 or later for both Windows and Macintosh.
    Release notes & download
  14. Version 1.15 Released Jan 24, 2019 First seen Jul 5, 2026
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    It has become compat​ible with the SIGMA 28mm F1.4 DG HS​M | Art for SIGMA.

    Release notes & download
  15. Version 1.14 Released Nov 29, 2018 First seen Jul 5, 2026

    Added support for 70-200mm F2.8 DG OS HSM Sports lens. — summary by updatemystuff.com

    Show release notes

    It has become compatible with the SIGMA 70-200mm F2.8 DG OS HSM | Sports. Note: Bef​ore updating the SIGMA MOUNT CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has​ been updated to ver. 1.4.1 or later for Windows, and ver. 1.4.0 or later for Macintosh.

    Release notes & download
  16. Version 1.13 Released Oct 30, 2018 First seen Jul 5, 2026

    Adds compatibility with SIGMA 40mm F1.4 DG HSM | Art lens — summary by updatemystuff.com

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    It has become compatible with th​e SIGMA 40mm F1.4 DG HSM | Art for SIGMA. Note: Before updating the SIGMA MOUNT CONVERTER MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.4​.1 or later for Windows, and ver. 1.4.0 or later for Macintosh.

    Release notes & download
  17. Version 1.12 Released Oct 2, 2018 First seen Jul 5, 2026

    Adds support for SIGMA 60-600mm and 24-70mm lenses — summary by updatemystuff.com

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    It has become compatible with the SIGMA 60-600mm F4.5-6.3 DG OS​ HSM | Sports.

    It has become compatible with the SIGMA 24-70mm F2.8 DG OS HSM | Art (For SIGMA: Ver.1.03, For Canon: Ver.2.02).

    Note: Before updating the firmware using the SIGMA MOUNT CONVERTER MC-11, please ensure to update SIGMA Optimization Pro to Ve​r.1.4.1 or later for Windows, and Ver.1.4.0 or later for Macintosh.

    Release notes & download
  18. Version 1.11 Released Sep 10, 2018 First seen Jul 5, 2026

    Adds compatibility with a new lens and improves autofocus in peripheral areas and Eye AF for applicable lenses. — summary by updatemystuff.com

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    It has become compatible with the SIGMA 50-100mm F1.8 DC HSM | Art (Firmware Ver.1.01).With applicable SGV lenses*, it has improved AF performance in the peripheral areas of the image as well as the “Eye AF” function when it is selected, * Applicable​ SGV lenses: SIGMA 30mm F1.4 DC HSM | Art、SIGMA 14mm F1.8 DG HSM | Art、SIGMA 20mm F1.4 DG HSM | Art、SIGMA 24mm F1.4 DG HSM | Art、SIGMA 500mm F4 DG OS HSM | Sports、SIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary、SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary、SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary、SIGMA 50-100mm F1.8 DC HSM | Art、SIGMA​ 12-24mm F4 DG HSM | Art、SIGMA 24-35mm F2 DG HSM | Art、SIGMA 24-105mm F4 DG OS HSM | Art、SIGMA 120-300mm F2.8 DG OS HSM | Sports、SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary、SIGMA 150-600mm F5-6.3 DG OS HSM | Sports Note: Before updating the firmware using the SIGMA MOUNT CONVERTER MC-11, please ensure to update SIGMA Optimization Pro to Ver.1.4.1 or later for Windows, and Ver.1.4.0 or later for Macintosh.

    Release notes & download
  19. Version 1.10 Released Jun 12, 2018 First seen Jul 5, 2026

    Adds support for two additional Sigma Art lenses. — summary by updatemystuff.com

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    It has become compatible with the SIGMA 70mm F2.8 DG MACRO｜Art for SIGMA.It has become compatible with t​he SIGMA 105mm F1.4 DG HSM｜Art for SIGMA.

    Note: Before updating the MC-11 firmware, please ensure SIGMA Optimization P​ro has been updated to ver. 1.4.1 or later for Windows, and ver. 1.4.0 or later for Macintosh.

    Release notes & download
  20. Version 1.09 Released Mar 7, 2018 First seen Jul 5, 2026

    Adds 14-24mm lens support, improves autofocus for select lenses in peripheral and Eye AF modes, and fixes flash lag issues. — summary by updatemystuff.com

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    It has become compatible with the SIGMA 14-24mm F2.8 DG HSM | Art for SIGMA.With the SGV lenses*1 listed below, it has improved AF performance in the peripheral areas of the image as well as when the “Eye AF” function is selected.

    With lenses that are not compatible with the MC-11, it h​as corrected the release time lag which occurred during flash photography.*2 Note: Before updating the MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.4.1 or later for Windows, and ver. 1.4.0 or later for Macintosh. *1 SIGMA 35mm F1.4 DG HSM | Art, SIGMA 50mm F1.4 DG HSM | Art, SIGMA 85mm F1.4 DG HSM | Art, SIGMA 135mm F1.​8 DG HSM | Art, SIGMA 18-35mm F1.8 DC HSM | Art, SIGMA 24-70mm F2.8 DG OS HSM | Art, SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary ＊2 Please note that this does not guarantee accurate operation with all the lenses that are not compatible with the MC-11.

    Release notes & download
  21. Version 1.08 Released Sep 8, 2017 First seen Jul 5, 2026

    Fixes false focus confirmation with certain zoom lenses on Sony a9 and adds compatibility with updated lens firmware versions. — summary by updatemystuff.com

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    It has corrected the phenomenon which may occur with ​the combination of SIGMA MOUNT CONVERTER MC-11 and some of SIGMA’s interchangeable zoom lenses on Sony a9 (ILCE-9) that when using AF-S mode and shooting in telephoto range, it could occasionally display the shot as in focus, although it may not be correctly locked on the subject.

    It has become compatible with the SIGMA 24-70mm F2.8 DG OS HSM | Art for SIGMA (Firmware Ver.1.02), as well as the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for SIGMA (Firmware Ver.1.02).

    Note: Before updating the MC-11 firmware, pl​ease ensure SIGMA Optimization Pro has been updated to ver. 1.4.1 or later for Windows, and ver. 1.4.0 or later for Macintosh.

    Release notes & download
  22. Version 1.07 Released Aug 18, 2017 First seen Jul 5, 2026

    Adds support for the 24-70mm F2.8 DG OS HSM | Art lens. — summary by updatemystuff.com

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    It has become compatible with the SIGM​A 24-70mm F2.8 DG OS HSM | Art for SIGMA (ver. 1.01). Note: Before updating the MC-11 firmware, please ensure SIGMA Opti​mization Pro has been updated to ver. 1.4.1 or later for Windows, and ver. 1.4.0 or later for Macintosh.

    Release notes & download
  23. Version 1.06 Released Jul 20, 2017 First seen Jul 5, 2026

    Fixes autofocus failure when attaching certain non-compatible lenses. — summary by updatemystuff.com

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    It corrects the phenomenon that AF does not operate properly when some lenses that are not compat​ible with the MC-11 are attached.

    Note: Before updating the MC-11 firmware, please ensure SIGMA Optimization Pro has been updat​ed to ver. 1.4.1 or later for Windows, and ver. 1.4.0 or later for Macintosh.

    Release notes & download
  24. Version 1.05 Released Jul 5, 2017 First seen Jul 5, 2026

    Added compatibility with three Sigma Art and Contemporary lenses. — summary by updatemystuff.com

    Show release notes

    It has become compatible with the SIGMA 14mm F1.8 DG HSM | Art and the SIGMA 24-70mm F2.​8 DG OS HSM | Art.It has become compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for SIGMA (ver. 1.01).

    Note: Before updating the MC-11 firmwa​re, please ensure SIGMA Optimization Pro has been updated to ver. 1.4.1 or later for Windows, and ver. 1.4.0 or later for Macintosh.

    Release notes & download
  25. Version 1.04 Released May 17, 2017 First seen Jul 5, 2026

    Adds compatibility with three new SIGMA Contemporary lenses. — summary by updatemystuff.com

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    It has become compatible with the SIGMA 17-70mm F2.8-4 DC MACRO OS HSM |​ Contemporary in SIGMA mount (firmware version 1.02).It has become compatible with the SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary in SIGMA mount (firmware version 1.01).It has become compatible ​with the SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary in SIGMA mount (firmware version 1.01).

    Note: Before updating the MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.4.1 or later for Windows, and ver. 1.4.0 or later for Macintosh.

    Release notes & download
  26. Version 1.03 Released Mar 10, 2017 First seen Jul 5, 2026

    Adds compatibility with three additional lenses for use with this mount converter. — summary by updatemystuff.com

    Show release notes

    It has become compatible with the SIGMA 135mm F1.8 DG HSM | Art and SIGMA 100-400mm F5-6​.3 DG OS HSM | Contemporary.

    It has become compatible with the SIGMA 24-105mm F4 DG OS HSM | Art in SIGMA mount (firmware version 1.01).

    Note: Before updating the MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.4.1 or later ​for Windows, and ver. 1.4.0 or later for Macintosh from the following download page.

    Release notes & download
  27. Version 1.02 Released Oct 27, 2016 First seen Jul 5, 2026

    Improves startup speed, enhances optical stabilizer compatibility, and fixes distortion display issues. — summary by updatemystuff.com

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    It is fully functional with SIGMA 12-24mm F4 DG HSM | Art, SIGMA 500mm F4 DG OS HSM | Sports and SIGMA 85mm F1.4 DG HSM | Art lenses​.It has reduced the startup time between turning on the camera and taking an image by not initially driving the focus when the camera is turned on.When lenses with Optical Stabilizer (OS) function that are not fully compatible with SIGMA MOUNT CONVERTER MC-11 are attached with SIGMA MOUNT CONVERTER MC-11 a​nd mounted on a camera which incorporates a stabilizer unit, it enables the camera’s stabilizer unit to be turned off and the lens’s OS function to be turned on and off.It has corrected the phenomenon where the distortion correction figure is not indicated properly in the camera, when SIGMA 24-105mm F4 DG OS HSM | Art is attached.

    Release notes & download
  28. Version 1.01 Released May 13, 2016 First seen Jul 5, 2026

    Fixed LED indication, continuous shooting, OS lens responsiveness, and aperture behavior. — summary by updatemystuff.com

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    It has improved the following phenomenon that occurs when lenses that are not compatible with the MC-11 are attached and no light is emitted on the MC-11’s LED lamp.

    It does not operate properly on continuous shooti​ng mode.

    In the case of some lenses that incorporate an OS function, when the camera’s power is turned off, it does not respond to any operation for a certain period of time.

    When open aperture is not selected for shooting, the aperture does not return to fully open.

    • Improvements may not be visible with some products.
    • The phen​omenon that the diaphragm closes when the camera’s power is turned off is due to the characteristic of the camera and is considered to specification.
    Release notes & download

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