Sigma MOUNT CONVERTER MC-11 (EF-E)
firmware v1.02
Sigma · Released Oct 27, 2016 · First seen Jul 5, 2026
v1.02 is not the latest firmware for the Sigma MOUNT CONVERTER MC-11 (EF-E): the current version is v1.43 (August 27, 2026). Go to v1.43
In short — summary by updatemystuff.com
Speeds up startup, improves focus accuracy with Canon EF lenses, and enhances optical stabilizer control.
- Faster startup by skipping initial focus drive when camera turns on
- Improved autofocus accuracy for Canon EF lenses with limited compatibility
- Better optical stabilizer compatibility allowing independent lens OS control
Written from Sigma's release notes, which are printed in full below.
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What's in this update
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.
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