$10 · Sigma lens firmware upgrade service (USB dock UD-01)

Get your Sigma Lenses (Canon EF mount only) up to date. Upgrade the lens firmware to improve the lens performance. One price, 10 dollars only for one time service, bring all your Sigma Lenses (Canon EF mount only), and I will upgrade the firmware in front of your eyes. *** For returning custmoers, only 5 dollars. Verified by your email. *** You can check the official sigma firmware website: https://www.sigma-global.com/en/download/lenses/firmware/ Here is the COMPATIBILITY CHART: https://www.sigmacanada.ca/en/sigma-usb-dock Email for quesions and apointment.