The Nadir Adapter is an acra-swiss style mounting bracket. It attaches to the vertical rail and clamps to lower rail of the NN6 / NN3 MK3 allowing for 180° rotation of upper assembly.
Images show NN6 (sold separately) with Nadir Adapter installed.
Note: Unfortunately there is no quick reference guide as of yet for the NN6 but very soon. The NN6 is built from the ground up with robotic add-ons in sight. It's a very intuitive design and works without issue for most. This product has been well tested in the field which is bringing in positive reviews by early users. However as with any new product we cannot test against all possible cameras and equipment configurations. As early feedback comes we are making little tweaks here and there to better the performance. If you see any need for improvements we would love to hear from you.
Nikon AF-S 24-70mm f/2.8G is not compatibility with the NN6.