problem i bought the NN4 to work with 16/35 f4 nikon and 24/70 F2;8 and it did'nt work
i found just at 24 with the 16x35 a good nodal point but at 16 we need just 1 or 2 cm more depht for nodal point .
my idea and question do you think it could work if i add a manfrotto quick release 357 on th upper to get more back my camera .