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Once SIGMA receives the completed request for the Mount Conversion Service, the lens will be sent to the repair centre for essential optimization and adjustment to the internal core system. A lot of lenses can be changed in our service centre in the Netherlands, but in rare cases lenses need to be sent to Japan.
Normally, it takes about 10 working days if we can do it locally. If we need to send it to our factory in Japan, it usually takes 3-4 weeks.
You can download a complete list of which optics we can do locally, and which needs to be sent to Japan.
Mount Conversion List
SIGMA Imaging Ireland offers a 3 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 five 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).
* The initial warranty is one year and is extended to a total of three years when you register your product.
The most convenient option is to contact SIGMA's authorized Mount Conversion service partner, SIGMA Benelux in the Netherlands. Please send an e-mail to service@sigmabenelux.com with the lens(es) you would like to convert together with your contact details.