Thank you for purchasing and using our products.
We would like to share the results of our investigation regarding unto the operation of the SIGMA 24-70 mm F2.8 DG DN | Art for SONY E-mount, when used on the SONY α7S III.
SIGMA 24-70 mm F2.8 DG DN | Art for SONY E-mount
The MF Assist is cancelled on the SONY α7S III when shooting in the manual focus (MF) or direct manual focus (DMF) mode.
We are planning a firmware update to address this issue, which will be announced in due course. We apologize for any inconvenience caused to customers who are using this product combination.
For further assistance please contact Sigma Imaging (UK) Ltd Service Department by email: email@example.com or telephone: 01707 329 999
We appreciate your continued support for our company and products.