Dear Nikon D6 users

Thank you for purchasing and using our products.

We have found that some SIGMA lenses for Nikon are not fully compatible with the Nikon D6. When certain lenses are attached to the camera the below phenomenon will occur.
Note: We can confirm that there are no known issues for the general operation of current products other than the concerned lenses listed below.

[Products concerned]
SIGMA 8mm F3.5 EX DG CIRCULAR FISHEYE
SIGMA 15mm F2.8 EX DG DIAGONAL FISHEYE

[Phenomenon]
AF operation may not be stable
 
[Customer support]
Customers who use the products concerned are able to receive free firmware updates at their nearest authorized SIGMA subsidiary / distributor.

For the products announced on 9 June 2020, we plan to update the firmware as follows:

【20 August update】
SIGMA 12-24mm F4 DG HSM | Art
SIGMA 14-24mm F2.8 DG HSM | Art
SIGMA 40mm F1.4 DG HSM | Art
SIGMA 85mm F1.4 DG HSM | Art

【Post-September update】
SIGMA 14mm F1.8 DG HSM | Art
SIGMA 28mm F1.4 DG HSM | Art
SIGMA 105mm F1.4 DG HSM | Art
SIGMA 135mm F1.8 DG HSM | Art

For further information, please contact your nearest authorized SIGMA subsidiary / distributor.
https://www.sigma-global.com/en/about/world-network/

We appreciate your continued support for our company and products.