The Nikon FT1 Mount Adapter allows you to use Nikon F-mount lenses on the 1-series cameras. It provides control of autofocus, exposure, VR, and aperture on compatible lenses. This opens up the lens selection for the 1-series. Do keep in mind the 2.7x crop factor of the 1-series sensor, so most lenses will become a telephoto. Both mounts are of metal construction, and the adapter has it’s own tripod mount to prevent stress on the camera’s mount.
However, it does have it’s limitations. AF is limited to the AF-S mode, so no continuous focus via AF-C. Also, you’ll only have access to center focus point only. You cannot use teleconverters, extension tubes, some vintage lenses or the Nikon PC-E 24mm f3.5 with the adapter. For a detailed list of compatible lenses and function limitations, take a look here.
Please Note: The FT1 adapter provides AF and AE with AF-S lenses only. Many of the Nikon D-lenses will work, but they will not give you AF.