From Sigma:
The Sigma Corporation is pleased to announce a chargeable service for installing the Rear Filter Holder FHR-11 on the SIGMA 14mm F1.8 DG HSM | Art for Canon.
From September onwards, the dedicated service staff for Sigma products will be able to install the Rear Filter Holder FHR-11 on SIGMA 14mm F1.8 DG HSM | Art for Canon.
The Rear Filter Holder FHR-11 is an accessory exclusively designed for the SIGMA 14mm F1.8 DG HSM | Art for Canon, and it enables photographers to use a filter sheet with the lens.By attaching it to the rear of the lens, it will allow more freedom of expression.
For details of cost and the commencement of the service, please contact your nearest authorized SIGMA subsidiary / distributor.In case it is not convenient for your environment to use the installation service and you prefer to do it by your own effort, the necessary parts can be sold.Please contact your nearest authorized SIGMA subsidiary / distributor for further information. Customers who do not own the appropriate tools or who do not feel confident in attaching the filter holder themselves may take advantage of the chargeable installation service.