This T-Mount to Nikon F Adapter mounts to your Celestron NexStar 6SE 150mm f/10 Telescope to view and capture the outer world with a Nikon F-Mount camera, like the Nikon D850. The T-Mount adapter threads to the telescope while a pre-attached Nikon F T-Ring clicks right onto your camera like a lens. Please note that it is only recommended to use DSLR or Mirrorless cameras with the T-Ring, as cinema cameras will be too large to attach to the telescope.