Sigma issued an update on their lens compatibility with the Canon EOS R mirrorless camera - the autofocus and image stabilization work "without any issues":
Operating conditions of the Canon “EOS R” and SIGMA’s interchangeable lenses for Canon mount
Thank you for purchasing and using our products.
We would like to share the results of our further investigations regarding the operating conditions of the Canon “EOS R” and SIGMA’s interchangeable lenses for Canon mount.
When SIGMA’s interchangeable lenses in the current product lineup, listed below, are used in combination with the Canon “EOS R” and their “Mount Adapter EF-EOS R” or “Control Ring Mount Adapter EF-EOS R”, both AF and AE operate without any issues.
Furthermore, lenses which incorporate Optical Stabilizer (OS) will work with the OS function properly in effect.
In addition, when the Digital Lens Optimizer is switched [OFF], but “Peripheral illumination correction”, “Chromatic aberration correction” and “Distortion correction”, located within the in-camera Lens Aberration Correction function is switched [ON], the appropriate corrections can be achieved in accordance with the optical characteristics of each lens. This is applicable to DG and DC lenses from Contemporary, Art and Sports line listed below which were released after March, 2018, or those of which firmware has been updated to Ver.2.0 or later.
For other lenses, the Digital Lens Optimizer as well as the in-camera Lens Aberration Correction function cannot be used. Therefore, please set all to [OFF] before shooting.
＜Applicable products＞
DG Lens
SIGMA 12-24mm F4 DG HSM | Art
SIGMA 14-24mm F2.8 DG HSM | Art
SIGMA 24-35mm F2 DG 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 APO 200-500mm F2.8/400-1000mm5.6 EX DG
SIGMA APO 300-800mm F5.6 EX DG HSM
SIGMA 8mm F3.5 EX DG CIRCULAR FISHEYE
SIGMA 14mm F1.8 DG HSM | Art
SIGMA 15mm F2.8 EX DG DIAGONAL FISHEYE
SIGMA 20mm F1.4 DG HSM | Art
SIGMA 24mm F1.4 DG HSM | Art
SIGMA 28mm F1.4 DG HSM | Art
SIGMA 35mm F1.4 DG HSM | Art
SIGMA 40mm F1.4 DG HSM | Art
SIGMA 50mm F1.4 DG HSM | 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
SIGMA 70mm F2.8 DG MACRO | Art
SIGMA MACRO 105mm F2.8 EX DG OS HSM ＊
SIGMA APO MACRO 150mm F2.8 EX DG OS HSM ＊
SIGMA APO MACRO 180mm F2.8 EX DG OS HSM ＊
DC Lens
SIGMA 8-16mm F4.5-5.6 DC HSM ＊
SIGMA 10-20mm F3.5 EX DC HSM ＊
SIGMA 17-50mm F2.8 EX DC OS HSM ＊
SIGMA 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary ＊
SIGMA 18-35mm F1.8 DC HSM | Art ＊
SIGMA 18-200mm F3.5-6.3 DC MACRO OS HSM | Contemporary ＊
SIGMA 18-250mm F3.5-6.3 DC MACRO OS HSM ＊
SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM | Contemporary ＊
SIGMA 50-100mm F1.8 DC HSM | Art ＊
SIGMA 4.5mm F2.8 EX DC CIRCULAR FISHEYE HSM ＊
SIGMA 10mm F2.8 EX DC FISHEYE HSM ＊
SIGMA 30mm F1.4 DC HSM | Art ＊
＊ Camera’s “Scene Intelligent Auto mode” cannot be used.
Precautions for when DC lenses are used
When SIGMA’s DC lenses where the image circle is designed to match APS-C sized sensors are used, “1.6x (Crop)” will not be set automatically. Please select “1.6x (Crop)” manually. There are future plans for a firmware update to be announced at a later date that will make the DC lenses from Contemporary and Art line compatible with the “1.6x (Crop)”, to be set automatically, as well as Camera’s “Scene Intelligent Auto mode”.
Phenomena particular to 3 lenses were confirmed
After careful investigation, we confirmed some phenomena particular to 3 products listed below. Regarding firmware updates for these lenses, we are going to announce them at a later date.
SIGMA 24-70mm F2.8 DG OS HSM | Art
・It may require the battery to be taken out once, if restarting the camera does not work when the lens is taken off the camera while the lens’s OS function is in operation.
・It may stop the focus driving from infinity to closer focus distance while shooting video with AF.
SIGMA 60-600mm F4.5-6.3 DG OS HSM | Sports
・It may require the battery to be taken out once, if restarting the camera does not work when the lens is taken off the camera while the lens’s OS function is in operation.
SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary
・It may require the battery to be taken out once, if restarting the camera does not work when the lens is taken off the camera while the lens’s OS function is in operation.
・It may stop the focus driving from infinity to closer focus distance while shooting video with AF.
Other precautions
・AF can be used within the area of approximately 80% of the height and width of the sensor surface.
・For interchangeable lenses which are not from Contemporary, Art or Sports line, please focus using MF, since it may be difficult to achieve sufficient focusing speed and accuracy.
・Tele Converters cannot be used together.
・Having the focus mode switch set to MF does not let the lens stored automatically when the camera is turned off.
・Discontinued products have different operating conditions depending on each product and their shipping period. For details, please contact your nearest authorized SIGMA subsidiary / distributor.
