Here is a new Canon patent, and it appear it is referring to the recently…
Sigma product advisory for Lens Aberration Correction bug on Canon EOS 6D Mark II, EOS 77D, Rebel T7i and Rebel SL2
Sigma issued a warning for some of their lenses. These lenses (see list below) are not fully compatible with the new Canon EOS 6D Mark II, EOS 77D, Rebel T7i and Rebel SL2. An error occurs during LIve View shooting when the “lens aberration correction” feature is turned on.
Sigma advisory:
Dear Canon EOS 6D Mark II, EOS 77D, EOS Rebel T7i, EOS Rebel SL2 Users
Thank you for purchasing and using our products.
We have found that some SIGMA interchangeable lenses for CANON are not fully compatible with EOS 6D Mark II, EOS 77D, EOS Rebel T7i, EOS Rebel SL2.
When certain lenses are attached to these cameras and the “Lens aberration correction” function on these cameras is set to “Enable” for Live View shooting, an error would occur.
Please set the “Lens aberration correction” function of the cameras to “Disable” when using SIGMA’s interchangeable lenses for CANON.
In addition, please also refer to other notice below, related to the usage of EOS mount SIGMA lenses on Canon cameras.
[Phenomenon]
When the lenses listed below are used on EOS 6D Mark II, EOS 77D, EOS Rebel T7i, EOS Rebel SL2 and the “Lens aberration correction” function on the camera is set to “Enable” for Live View shooting, an error would occur.
[Products concerned]
- SIGMA 30mm F1.4 DC HSM | Art
- SIGMA 35mm F1.4 DG HSM | Art
- SIGMA 30mm F1.4 EX DC HSM
- SIGMA 50mm F1.4 EX DG HSM
- SIGMA 85mm F1.4 EX DG HSM
When using the SIGMA lenses for CANON, “Peripheral illumination correction”, “Chromatic aberration correction”, “Diffraction correction” as well as “Distortion correction” from the “Lens aberration correction” function of the camera are not supported. Therefore, we recommend you to set them to “Disable”.
If those functions are set to “Enable”, the performance of the lenses may not be accurate.
For further information, please contact your nearest authorized SIGMA subsidiary / distributor.
http://www.sigma-global.com/en/about/world-network/
We appreciate your continued support for our company and products.