Thank you for purchasing and using our products.
We have identified that the SIGMA 28-70mm F2.8 DG DN | Contemporary for Sony E-mount could occasionally cause blurring when using the in-body image stabilization function while the lens is attached on the gimbal.
At the moment, we are in process of the development of the new firmware that can correct this phenomenon, and aiming for the announcement on October 21st.
We are sorry for the inconvenience.
For further information, please contact your nearest authorized SIGMA subsidiary / distributor.
https://www.sigma-global.com/en/world-network/
We appreciate your continued support for our company and products.