This post on Chinese social media details the situation with Nikon and third-party Z-mount lens manufacturers. Here is the translated AI recap:
On March 2, 2026, the patent dispute between Nikon and Viltrox over the Nikon Z mount officially entered court proceedings. On the same day, Sirui abruptly removed all of its Nikon Z-mount autofocus lenses from sale. This followed earlier reports (January 21, 2026) that Nikon had sent legal warning letters not only to Viltrox but also to other Chinese third-party lens makers, many of whom were still negotiating compensation and had not yet been sued.
The article stresses that lawsuits evolve through multiple stages and that early court documents or announcements do not indicate final rulings. Nikon’s current enforcement effort is focused on autofocus lenses, not adapters or teleconverters, and is unrelated to the older F-mount. Viltrox was the first brand publicly identified in the dispute, but other domestic manufacturers may soon face similar legal pressure. Nikon’s main objective appears to be economic compensation, though it may also demand limits on products that strongly compete with Nikon’s own lenses. Negotiation remains possible.
Sirui’s sudden withdrawal has heightened uncertainty for the entire third-party Z-mount lens market. The article outlines several possible outcomes:
If Nikon gains an early court victory
Nikon is likely to intensify enforcement against other manufacturers. More brands could receive legal notices, and Sirui’s move could set a precedent. In the short term, third-party Z-mount autofocus lenses may largely disappear, sharply reducing consumer choice.
If a preliminary settlement is reached
Nikon may introduce formal patent licensing rules and fee structures. Sirui’s delisting could be a precaution ahead of licensing talks. Other manufacturers would likely pause sales and negotiate licenses, leading to a short-term market freeze until rules are clarified.
If litigation drags on without resolution
The third-party market may split: weaker brands may exit the Z-mount entirely, while stronger ones pause sales and focus on reducing technical dependence on Nikon. OEM lenses would regain clear market dominance, and third-party ecosystem growth would slow.
If Nikon and Viltrox settle and cooperate
Sirui’s withdrawal may prove temporary. After a settlement, Sirui could be among the first to secure a license and relaunch products, followed by others. The market would enter a more standardized phase: prices would rise due to licensing fees, but product variety would gradually return, allowing licensed third-party lenses to coexist with Nikon’s own offerings.
Stores and distributors in China are removing all Sirui Z-mount lenses
