One of the best things about Nikon lenses is they mostly have manual irises. None of this crappy controlled via the camera iris. Fine for stills but for video it sucks.
For me the biggest issue with both camera controlled iris and manual iris is the damn clicking. No smooth iris change, awful if exposure changes during a shot. That is why if you are a Canon DSLR owner (and obviously a Nikon DSLR D3s owner) I recommend buying the Nikon mount versions, the ZF.2 , get a Fotodiox Pro adaptor (make sure it is the pro adaptor) and get your lenses modded by Duclos lenses. Not only will they turn the iris into a smooth cine style iris but they will add of a permanent follow focus gear and even give all your lenses the same front filter diameter. All way cheaper than buying the new Zeiss Cp.2 lenses (although they won’t have the dual PL/ EF mount) or the same cine action, but they will be pretty damn close and be much cheaper.
One word of warning Nikon ZF lenses focus in the opposite direction to ZE lenses (an annoying Nikon thing) BUT these lenses will be able to be used on all sorts of cameras in the future like Scarlet etc…
If you buy ZE you are stuck as there is no manual iris wheel. You can still get the permanent gear and the front size changed, but no cine style iris!
I prefer the Zeiss lenses for video over the Canons as they have a longer focus barrel rotation and have nice hard focus stops. Also their optics are superb. Mind you so are the L series Canon ones too!
This will of course work for all manual iris Nikon lenses too…
On average the mod costs around $250, well worth it.