Nikon has filed a patent infringement lawsuit against Viltrox and its affiliates with the Shanghai Intellectual Property Court, case no. (2025) Hu73 Zhi Min Chu No. 182, claiming royalties from Viltrox for infringement of Nikon's patent by using its invention without permission during its provisional period of protection. The court has scheduled a hearing date of March 2, 2026, for Nikon's infringement claim regarding Viltrox's Z-mount lenses, which include LAB series primes and a teleconverter, with Nikon claiming to support only licensed third-party partners.