Change your mind? Change you mount.

The Lens Mount Conversion service, available only from Sigma

Service Concept

We believe that a lens is the most important resource for photographers and the key device needed in creating the individual photographic expression. The hope of the new product line of Sigma’s Global Vision lenses is to provide a system that is genuinely photographer-centered and designed to build a long lasting relationship with the user. Sigma introduced a revolutionary way of re-thinking lenses with the introduction of the Global Vision product line and as an experienced lens manufacturer has proven again the capability of creating a diverse range of interchangeable lenses. The company’s desires and know-how have crystalized further by creating a new unique paid service with the introduction of the “Mount Conversion Service”*. With this service, any of the Global Vision Lenses can be converted to a different mount system. This allows photographers the further flexibility of changing their camera body systems and is likely to evolve the lens manufacturing industry to a higher level of service expectation.

*This “Mount Conversion Service” is different from a normal repair. In order to apply for the service, please fill out the form on the service section on this page.

Does the camera define the value of your lenses?

There may be one lens in your kit which you favour and choose to use above all others because it is the lens that is capable to capture a variety of photographic scenes. It produces the quality of images that you desire and provides the handling comfort you appreciate. These elements have become a unique character of the lens and define your loyalty and preference.

Interchangeable lens camera systems appear to be the preferred choice of photographers because they offer more options. Allowing photographers the ability to change lenses freely and have the flexibility of photographic expression. The lens choice is based on the creation desired. Nevertheless, the process offers limited choices as the lenses is dependent on the specification of the different camera systems. In other words, you can’t use lenses freely if the camera system is not compatible.

However, at Sigma, we believe it is the lenses that are the key device to creating photographic expression. It is a shame that there is no system that purely sets the standard based on the functions and individual qualities of interchangeable lenses.

A lens is your precious resource,
carry it with you longer

SIGMA has never stopped thinking of ways to create lenses that will ensure photographers want to use for many years and which they require in order to achieve their masterpiece images.

It is with great pride that we can provide a service which will enable photographers to maintain their lens as a precious resource and never let it become obsolete. The “Mount Conversion Service” allows the mount of your current SIGMA lenses to be changed to another mount of your choice. This service gives a new life to your favourite lenses when you wish to use it on a different camera body.


All lenses from SIGMA’s new Global Vision product lines in the Art, Contemporary and Sports category can be converted and submitted for the “Mount Conversion Service”. The new lenses were designed to enable customers to convert the mount at any time. SIGMA will change the relevant parts for a different mount as well as its internal core system accordingly.

The Global Vision Lenses which can be converted consist of the following;

Sigma Interchangeable lenses for DSLR Cameras can be converted to any of the following mounts; Sigma SA, Sony A-Mount, Sony E-Mount, Nikon F, Pentax K, Canon EF, Canon EF-M, Fujifilm X-Mount, L-Mount

16mm F1.4 DC DN | C
20mm F1.4 DG HSM | A
24mm F1.4 DG HSM | A
24mm F3.5 DG DN | C
30mm F1.4 DC DN | C
30mm F1.4 DC HSM | A
35mm F1.4 DG HSM | A
35mm F1.4 DG DN | A
35mm F2 DG DN | C
45mm F2.8 DG DN | C
50mm F1.4 DG HSM | A
56mm F1.4 DC DN | C
65mm F2 DG DN | C
70mm F2.8 DG MACRO | A
85mm F1.4 DG DN | A
105mm F2.8 DG DN MACRO | A
17-70mm F2.8-4 DC Macro OS HSM/ DC Macro HSM | C
18-35mm F1.8 DC HSM | A
18-200mm F3.5-6.3 OS DC Macro HSM | C
18-300mm F3.5-6.3 OS DC Macro OS HSM | C
24-105mm F4 DG OS HSM | A
28-70mm F2.8 DG DN | C

Cost of Conversion Mount Service £240

14mm F1.8 DG HSM | A
28mm F1.4 DG HSM | A
35mm F1.2 DG DN | A
40mm F1.4 DG HSM | A
85mm F1.4 DG HSM | A
105mm F1.4 DG HSM | A
135mm F1.4 DG HSM | A
500mm F4 DG HSM | S
12-24mm F4 DG HSM | A
14-24mm F2.8 DG HSM | A
14-24mm F2.8 DG DN | A
24-35mm F2 DG HSM | A
24-70mm F2.8 DG OS HSM | A
24-70mm F2.8 DG DN | A
50-100mm F1.8 DG HSM | A
60-600mm F4.5-6.3 DG OS HSM | S
70-200mm F2.8 DG OS HSM | S
100-400mm F5-6.3 DG OS HSM | C
100-400mm F5-6.3 DG DN OS | C
120-300mm F2.8 DG OS HSM | S
150-600mm F5-6.3 DG OS HSM | S
150-600mm F5-6.3 DG OS HSM | C

Cost of Conversion Mount Service £390

Sigma Interchangeable lenses for Mirrorless Cameras converted to any of the following mounts; Micro Four Thirds, Sony E-mount.

19mm F2.8 DN | A
30mm F2.8 DN | A
60mm F2.8 DN | A

Cost of Conversion Mount Service £105

It is important to clarify that the list of available lens mount conversions corresponds to the list of SIGMA releases. It is not possible to convert a lens to a mount which SIGMA has never released.

Sigma Tele-converter, USB DOCK and other accessory parts are not eligible for this Mount Conversion Service.

Above prices include VAT and return postage. Customers are responsible for sending the item directly to us either by courier or post. Refer to the instructions on how to request a Mount Conversion Service in the Service tab listed above.

No, we will only replace the key components and mount part of your lens. Optimization will be performed so that you can use it on your new camera.
Yes, as long as the lens in the requested mount has been released by SIGMA as a product.

How we conduct the service

Once Sigma Imaging UK receives the completed request for Mount Conversion Servie the lens will be sent to the Sigma Aizu factory for essential optimization and adjustment to the internal core system.

What is the length of time for the service?

Turnaround time is usually 3-4 weeks.

Warranty Period

Sigma Imaging UK offers a three year warranty to all registered customers of Sigma certifed product and therefore the Mount Conversion Service will be eligible under this warranty period. For any lenses that are beyond three years, we offer a 6 month warranty after the Mount Conversion. We will check and ensure that the optical performance of all mount converted products remains the same using our original measurement system A1 (Aizu 1)

How do I request a
Mount Conversion Service?

There are two possible ways to request the service. Please download and complete the application form, enclose your full contact details including a return address (returned packages will need to be signed for) and, if under warranty, a copy of your proof of purchase. We recommend using Royal Mail Special Delivery as this is a ‘signed for’ service that includes insurance. Please note that all packaging will be discarded at the time of opening your parcel.

Our postal address is:
Service Department
Sigma Imaging (UK) Ltd
1 Little Mundells
Welwyn Garden City


If possible, please provide an email address as this will allow us to acknowledge receipt of your product by email; otherwise we will post you a letter of confirmation of receipt, including a unique reference number which you should keep in case you need to contact us regarding the repair.