Fixed a problem in which the MF assist function would not work in rare cases when a lens with the MF switching function (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 recording in AF mode with a lens which has the MF switching function (manual override) enabled.

It has improved the phenomenon whereby the lens’s optical stabilizer effect differs depending on the shutter type and drive mode used.

It makes the converter compatible with the SIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary in Canon EF mount, that has the latest firmware Ver2.03.

It makes the converter compatible with the SIGMA 500mm F4 DG OS HSM | Sports in Canon EF mount, that has the latest firmware Ver.2.03.

※Please be sure to update SIGMA Optimization Pro to Ver.1.6.0 or later when updating the MC-11 firmware. SIGMA Optimization Pro

It makes the converter compatible with the SIGMA 30mm F1.4 DC HSM | Art in Canon EF mount, that has the latest firmware Ver.2.01.
It makes the converter compatible with the SIGMA 28mm F1.4 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.1.02.
It makes the converter compatible with the SIGMA 70mm F2.8 DG MACRO | Art in Canon EF mount, that has the latest firmware Ver.1.01.
It makes the converter compatible with the SIGMA 85mm F1.4 DG HSM | Art in Canon EF mount, that has the latest firmware Ver. 2.03.
It makes the converter compatible with the SIGMA 135mm F1.8 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.03.
It has improved a rarely-occurring blinking phenomenon during movie shooting.

※Please be sure to update SIGMA Optimization Pro to Ver.1.6.0 or later when updating the MC-11 firmware. SIGMA Optimization Pro

It makes the converter compatible with the SIGMA 12-24mm F4 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.01
It makes the converter compatible with the SIGMA 24-35mm F2 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.01
It makes the converter compatible with the SIGMA 50-100mm F1.8 DC HSM | Art in Canon EF mount, that has the latest firmware Ver.2.03
It makes the converter compatible with the SIGMA 60-600mm F4.5-6.3 DG OS HSM | Sports in Canon EF mount, that has the latest firmware Ver.1.03
It makes the converter compatible with the SIGMA 24mm F1.4 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.02
It makes the converter compatible with the SIGMA 35mm F1.4 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.02

※Please be sure to update SIGMA Optimization Pro to Ver.1.6.0 or later when updating the MC-11 firmware. SIGMA Optimization Pro

It makes the converter compatible with the SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary in Canon EF mount, that has the latest firmware Ver.2.03.
It makes the converter compatible with the SIGMA 70-200mm F2.8 DG OS HSM | Sports in Canon EF mount, that has the latest firmware Ver.1.02.
It makes the converter compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary in Canon EF mount, that has the latest firmware Ver.2.07.
It makes the converter compatible with the SIGMA 150-600mm F5-6.3 DG OS HSM | Sports in Canon EF mount, that has the latest firmware Ver.2.02.
It makes the converter compatible with the SIGMA 20mm F1.4 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.01.

※Please be sure to update SIGMA Optimization Pro to Ver.1.6.0 or later when updating the MC-11 firmware. SIGMA Optimization Pro

It makes the converter compatible with the SIGMA 14mm F1.8 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.01.
It makes the converter compatible with the SIGMA 50mm F1.4 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.2.03.

※Please be sure to update SIGMA Optimization Pro to Ver.1.6.0 or later when updating the MC-11 firmware. SIGMA Optimization Pro

It makes the converter compatible with the SIGMA 14-24mm F2.8 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.1.02.
It makes the converter compatible with the SIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary in Canon EF mount, that has the latest firmware Ver.2.02.
It makes the converter compatible with the SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary in Canon EF mount, that has the latest firmware Ver.2.03.

※Please be sure to update SIGMA Optimization Pro to Ver.1.6.0 or later when updating the MC-11 firmware. SIGMA Optimization Pro

It makes the converter compatible with the SIGMA 14-24mm F2.8 DG HSM | Art in Canon EF mount, that has the latest firmware Ver.1.02.
It makes the converter compatible with the SIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary in Canon EF mount, that has the latest firmware Ver.2.02.
It makes the converter compatible with the SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary in Canon EF mount, that has the latest firmware Ver.2.03.

※Please be sure to update SIGMA Optimization Pro to Ver.1.6.0 or later when updating the MC-11 firmware. SIGMA Optimization Pro

It has become compatible with the SIGMA 18-35mm F1.8 DC HSM | Art for Canon EF mount, that has the latest firmware Ver.2.03.
It has become compatible with the SIGMA 24-105mm F4 DG OS HSM | Art for Canon EF mount, that has the latest firmware Ver.2.01.
It has become compatible with the SIGMA 120-300mm F2.8 DG OS HSM | Sports for Canon EF mount, that has the latest firmware Ver.2.02.

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

It has become compatible with the SIGMA 500mm F4 DG OS HSM | Sports for Canon EF mount, that has the latest firmware Ver.2.02.

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.

It has optimized the peripheral illumination correction data when used in combination with SIGMA 24-105mm F4 DG OS HSM | Art for CANON EF mount.
It has become compatible with the SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary for CANON EF mount, that has the latest firmware Ver.2.02.
It has become compatible with the SIGMA 24-70mm F2.8 DG OS HSM | Art for CANON EF mount, that has the latest firmware Ver.2.05.
It has become compatible with the SIGMA 40mm F1.4 DG HSM | Art for CANON EF mount, that has the latest firmware Ver.1.01.
It has become compatible with the SIGMA 105mm F1.4 DG HSM | Art for CANON EF 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.

It has become compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for CANON EF mount, that has the latest firmware Ver.2.06.

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.

It has become compatible with the SIGMA 28mm F1.4 DG HSM | Art for CANON EF mount, that has the latest firmware Ver. 1.01.
It has become compatible with the SIGMA 24-70mm F2.8 DG OS HSM | Art for CANON EF mount, that has the latest firmware Ver. 2.04.
It has become compatible with the SIGMA 150-600mm F5-6.3 DG OS HSM | Sports for CANON mount, that has the latest firmware Ver. 2.01.
It has become compatible with the SIGMA 500mm F4 DG OS HSM | Sports for CANON EF mount, that has the latest firmware Ver. 2.01.

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.

It has become compatible with the SIGMA 60-600mm F4.5-6.3 DG OS HSM | Sports for CANON EF mount, that has the latest firmware Ver.1.02.
It has become compatible with the SIGMA 70-200mm F2.8 DG OS HSM | Sports for CANON EF 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 CANON EF mount, that has the latest firmware Ver.2.02.
It has become compatible with the SIGMA 50mm F1.4 DG HSM | Art for CANON EF mount, that has the latest firmware Ver.2.02.

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.

It has become compatible with the SIGMA 24mm F1.4 DG HSM | Art for CANON EF mount, that has the latest firmware Ver.2.01.
It has become compatible with the SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary for CANON EF mount, that has the latest firmware Ver.2.02.
It has become compatible with the SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary for CANON EF mount, that has the latest firmware Ver.2.01.

It has become compatible with the SIGMA 120-300mm F2.8 DG OS HSM | Sports for CANON EF mount, that has the latest firmware Ver.2.01.
It has improved the AF speed when it is used in combination with the SONY α9 or SONY α7 III and the SIGMA 135mm F1.8 DG HSM | Art for CANON EF mount.

It has become compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for CANON EF mount, that has the latest firmware Ver.2.05.
It has become compatible with the SIGMA 135mm F1.8 DG HSM | Art for CANON EF mount, that has the latest firmware Ver.2.02.

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.

It has optimized the peripheral illumination correction data when it is used in combination with the SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary for Canon EF mount.
It has become compatible with the SIGMA 30mm F1.4 DC HSM | Art for CANON EF mount, that has the latest firmware Ver.2.00.
It has become compatible with the SIGMA 24-70mm F2.8 DG OS HSM | Art for CANON EF mount, that has the latest firmware Ver.2.03.
It has become compatible with the SIGMA 60-600mm F4.5-6.3 DG OS HSM | Sports for CANON EF mount, that has the latest firmware Ver.1.01.
It has become compatible with the SIGMA 120-300mm F2.8 DG OS HSM | Sports for CANON EF mount, that has the latest firmware Ver.2.00.
It has become compatible with the SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary for CANON EF mount, that has the latest firmware Ver.2.01.
It has become compatible with the SIGMA 85mm F1.4 DG HSM | Art for CANON EF mount, that has the latest firmware Ver.2.02.
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 to achieve 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 lenses
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 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.

It has become compatible with the 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary for CANON EF mount, that has the latest firmware Ver.2.01.
It has become compatible with the SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary for CANON EF mount, that has the latest firmware Ver.2.01.
It has become compatible with the SIGMA 18-35mm F1.8 DC HSM | Art for CANON EF mount, that has the latest firmware Ver.2.02.
It has become compatible with the SIGMA 50-100mm F1.8 DC HSM | Art for CANON EF mount, that has the latest firmware Ver.2.02.
It has become compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for CANON EF mount, that has the latest firmware Ver.2.04.

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 Windows, and ver. 1.5.0 or later for Macintosh.

It has become compatible with the SIGMA 500mm F4 DG OS HSM | Sports for CANON EF mount, that has the latest firmware Ver.2.00.
It has become compatible with the SIGMA 24-35mm F2 DG HSM | Art for CANON EF mount, that has the latest firmware Ver.2.00.
It has become compatible with the SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary for CANON EF mount, that has the latest firmware Ver.2.00.
It has become compatible with the SIGMA 28mm F1.4 DG HSM | Art for CANON EF mount.
It has become compatible with the SIGMA CINE LENS FF High Speed Prime Line 28mm T1.5 FF for EF mount and 40mm T1.5 FF for EF mount.

It has become compatible with the SIGMA 70-200mm F2.8 DG OS HSM | Sports.

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

It has become compatible with the SIGMA 40mm F1.4 DG HSM | Art for Canon.
It has become compatible with the SIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary for Canon and the SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary for Canon, that have the latest firmware Ver.2.00.

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.

It has become compatible with the SIGMA 105mm T1.5 FF EF mount Cine lens from the FF High Speed Prime Line.
It has become compatible with the SIGMA 24-105mm F4 DG OS HSM | Art for Canon which has the latest firmware Ver.2.00.

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 Ver.1.4.1 or later for Windows, and Ver.1.4.0 or later for Macintosh.

It has become compatible with the SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary (Firmware Ver.2.00) and SIGMA 150-600mm F5-6.3 DG OS HSM | Sports (Firmware Ver.2.00).
It has become compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary（Firmware Ver.2.03).
It has become compatible with the SIGMA 50-100mm F1.8 DC HSM | Art (Firmware Ver.2.01).
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.

It has become compatible with the following SIGMA interchangeable lenses for Canon* that have the latest firmware Ver.2.01.
It has become compatible with the SIGMA 14-24mm F2.8 DG HSM | Art for Canon with firmware Ver.1.01.
It has become compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for Canon with firmware Ver.2.02.

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.

* SIGMA 14mm F1.8 DG HSM | Art、SIGMA 20mm F1.4 DG HSM | Art、SIGMA 24mm F1.4 DG HSM | Art、SIGMA 12-24mm F4 DG HSM | Art、SIGMA 50-100mm F1.8 DC HSM | Art

It has become compatible with the SIGMA 105mm F1.4 DG HSM｜Art for Canon.
It has become compatible with the SIGMA interchangeable lenses for Canon that have the latest firmware Ver.2.01.

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.

It has become compatible with the SIGMA 70mm F2.8 DG MACRO | Art.

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.

It has become compatible with the SIGMA 14-24mm F2.8 DG HSM | Art for Canon.
It has become compatible with SIGMA interchangeable lenses for Canon*1 that are updated to firmware ver.2.00.
With the SGV lenses(Ver.2.00)^*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 has 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.

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 CANON (Firmware Ver.1.02), as well as the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for CANON (Firmware Ver1.03).

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.

It has become compatible with the SIGMA 24-70mm F2.8 DG OS HSM | Art for Canon (ver. 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.

It has become compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for CANON (ver. 1.02).

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.

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

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.

It has become compatible with the SIGMA 14mm F1.8 DG HSM | Art and SIGMA 24-70mm F2.8 DG OS HSM | Art.
It has become compatible with the FF High Speed Prime Line SIGMA 14mm T2 FF (EF) and the SIGMA 135mm T2 FF (EF).

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.

It has become compatible with the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for Canon (ver. 1.01).

It has become compatible with the SIGMA 24-105mm F4 DG OS HSM | Art in Canon mount (firmware version 1.02).
It has become compatible with the SIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary in Canon mount (firmware version 1.03).
It has become compatible with the SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary in Canon mount (firmware version 1.02).
It has become compatible with the SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary in Canon 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.

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 Cine Lenses; SIGMA 20 mm T1.5 FF EF mount, 24 mm T1.5 FF EF mount, 35mm T1.5 FF EF mount, 50 mm T1.5 FF EF mount, 85 mm T1.5 FF EF mount from FF High Speed Prime Line, and 24-35mm T2.2 FF EF mount from FF Zoom Line.

It has become compatible with the SIGMA 18-35mm T2 EF mount and the 50-100mm T2 EF mount Cine lenses from High Speed Zoom Line.

* If SIGMA Optimization Pro is Ver. 1.3 or earlier, please firstly update the version of the software to Ver. 1.4.

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 and 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 improved the AF accuracy of Canon EF lenses that are not fully compatible with SIGMA MOUNT CONVERTER MC-11.
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.

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 shooting 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 phenomenon 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.

It has improved the phenomenon whereby the lens’s optical stabilizer effect differs depending on the shutter type and drive mode used.

It makes the converter compatible with the SIGMA 500mm F4 DG OS HSM | Sports in SIGMA SA mount, that has the latest firmware Ver.1.03.

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 update SIGMA Optimization Pro to Ver.1.6.0 or later when updating the MC-11 firmware.

It has optimized the peripheral illumination correction data when 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.

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 compatible 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 compatible 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.

It has become compatible 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 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.

It has become compatible with the SIGMA 50mm F1.4 DG HSM | Art for SIGMA SA mount, that has 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.

It has become compatible with the SIGMA 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 firmware 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.

It has improved the AF speed when it is used in combination with the SONY α9 or SONY α7 III and the SIGMA 135mm F1.8 DG HSM | Art for SIGMA.

Note: For customers who own the SONY α9, please update the firmware of the camera to Ver.5.00 or later.

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.

It has optimized the peripheral illumination correction data when it is used in combination with 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 to
achieve 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 lenses
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 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.

It has become compatible with the SIGMA 28mm F1.4 DG HSM | Art for SIGMA.

It has become compatible with the SIGMA 70-200mm F2.8 DG OS HSM | Sports.

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

It has become compatible with the 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.

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 Ver.1.4.1 or later for Windows, and Ver.1.4.0 or later for Macintosh.

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.

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

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.

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 has 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.

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, 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.

It has become compatible with the SIGMA 24-70mm F2.8 DG OS HSM | Art for SIGMA (ver. 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.

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

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.

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 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.

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.

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.

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 and 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.

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 shooting 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 phenomenon 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.