In an unlikely turn of events, the Chinese social media has revealed that Nikon has filed a lawsuit against Viltrox in China. While the company has not made a public statement yet, court records on Chinese litigation sites reveal a legal proceeding that could lead to a block on Viltrox lenses for Nikon Z-mount cameras. So, what has caused this row and what could it mean for photographers? Here’s a look.
What does the Lawsuit Claim
Here is an AI-translated court hearing notice that surfaced on Nikon Rumors on January 17, which states the case as follows:
- Case Number: (2025) Hu73 Zhi Min Chu No. 182
- Case Type: Dispute over royalties for the provisional protection period of an invention patent
- Plaintiff: Nikon Corporation
- Defendants:
- Shenzhen Viltrox Technology Co., Ltd.
- Shenzhen Jueying Technology Co., Ltd. (parent manufacturing company)
- Shanghai Qiuhong Photographic Equipment Co., Ltd. (likely a distributor/retailer)
- Court: Shanghai Intellectual Property Court
- Hearing Date: March 2, 2026, 09:15
The Shanghai Intellectual Property Court is a specialized court that handles high-stakes patent disputes, which means Nikon is pretty serious about this lawsuit.
One of the most interesting parts of the lawsuit is the case type mentioned above. Under the Chinese patent law, the protection period is the window between the publication of the patent application and its formal approval. If the company, in this case Viltrox, is creating third-party lenses and the patent is granted later, the patent holder, Nikon, can demand retroactive royalties.
In other words, Nikon is alleging that Viltrox sold Z-mount lenses that use Nikon’s protected technology (likely the autofocus communication between the lens and the body), while Nikon’s patent application was pending. Now that the patent has been granted, Nikon is seeking payment for those sales. This strategy is used as a first legal step. A successful roll can also lead to the following:
- Forcing Viltrox into a formal licensing agreement, or
- Ask for court orders to stop the sale of the lenses if talks break down
Nikon is also suing a local seller, Shanghai Qiuhong Photographic Equipment Co., Ltd, which is said to be common in Chinese IP litigations. This also ensures that the case can be heard in Shanghai, rather than in Shenzhen, where Viltrox is based.
Social Media Reaction
Chinese social media platforms such as Weibo, Xiaohongshu, and Bilibili have all spoken about the anxiety amongst Nikon users and other third-party lens owners. One common question is whether the lenses for cameras such as the Z6 III, Z8, or Zf can be blocked later. Nikon can do so with firmware updates, which will render the Viltrox lenses useless.
On Reddit’s R/Nikon, users have also shared the same sentiments, with one user explicitly stating: “Lol. If this results in Viltrox no longer making Z lenses, I will start recommending Sony. If Nikon goes the nuke option by bricking existing Viltrox lens, I will sell my gears purely out of spite: you make me lose money, I (do my best to) make you lose money.“
There is also a comparison with Canon RF crackdown, where the latter aggressively went after third-party RF lenses, forcing companies to halt RF sales. While Nikon has been welcoming, this proves that they are not the same as Sony when it comes to third-party lens makers.
In addition, there is renewed debate over whether Viltrox even obtained official permission for its Z-series autofocus lenses. Viltrox once claimed that the Z-mount lenses were legally reverse-engineered. The lawsuit also suggests that Nikon believes at least one specific patent was used without authorization. Some users pointed out that Nikon is trying to persuade Viltrox to pause entry fees rather than ban the products entirely, similar to deals Nikon has signed with Sigma and Tamron.
As another Reddit user said, this could also be about Nikon losing money. “Viltrox released a 135mm f1.8 and a 35mm f1.2 recently, both of which directly challenge high-priced Nikon versions, so I wondered if Nikon would get concerned enough to do this.”
Either way, if Nikon wins, there are a few consequences that users will have to face:
- Higher prices for third-party Z-mount lenses if licensing fees are imposed
- Firmware uncertainty, making users hesitant to update their cameras
- Potential reshaping of Nikon’s image as an “open” mount system
The hearing date is set, and this case is still in the early stages. For now, there is no confirmed ban on sale, and we aren’t sure if Nikon will brick the lenses. So, it remains to be seen what the company has in mind. The lawsuit has sent shockwaves through the industry, especially since many users are relying on third-party lenses.
Honestly, this could be one of the worst moves Nikon makes.