Mount Conversion Service

Sigma Corporation of America and Sigma Japan will convert the current mount of your Sigma Global Vision lens to another mount of your choice. Sigma lenses from the current Art, Contemporary, or Sports lines are eligible for the Mount Conversion service. A lens can only be converted to a mount type that is offered by Sigma for that specific lens. *Please check that lens’ product page to view mount availability. Mount Conversion service is subject to mount, parts, and service availability.

Mirrorless lenses in the APS-C format cannot be converted to Full Frame format. Similarly, Full Frame format lenses cannot be converted to APS-C.

Some conversion services are conducted directly by Sigma Japan. In such an instance, your lens will be sent to Japan to be converted to the desired mount. Upon conversion completion, the lens will be returned to Sigma Corporation of America who will, in turn, ship the lens directly back to the owner. The anticipated turnaround time for this service is 4 – 8 weeks. 

To request a Mount Conversion, please include your request in the "Symptoms/Comments" section of the attached Online Repair Form below, along with the lens you would like to have converted, your current mount type, and the mount type that you would like to have installed. If you would like information on the pricing of the operation, or if you have any further questions regarding this service, please contact Sigma's Service Department. 

Tel: (631) 227-2036
Fax: (631) 585-1895
E-mail:  [email protected]