The 180-400mm f/4 is the latest Nikon lens to see orders suspended, according to PetaPixel. In this case it might not be a permanent status, as Nikon cites “production issues” for it stopping taking orders of the >$12,000 lens.
The Nikon 180-400mm f/4 was launched after Canon’s 200-400 f/4 came out and proved that enough amateur photographers had enough extra cash that they’d spend five figures for a zoom just one stop brighter than the typical $2,000 OEM 100-400.
The 500mm f/5.6 may have eaten up much of the market
The discontinuations seen in the past months have largely been older lenses and cheaper lenses, ones that have smaller margins and often more modern close alternatives.