What would be a good trinity lens for Samsung NX?
i'm thinking of :
It all depends on what you want to shoot and how small/light you want to keep your bag.
The 85mm f1.4 surely is a must-have for stunning head and shoulders portraits, but not everybody takes enough of such portraits to justify the investment in a premium lens. Also, the 85mm f1.4 is neither compact nor lightweight so it is more likely to be left at home.
The same goes for the 60mm f2.8 macro lens.
On the portable primes side, I'd say that the 30mm f2 is the one to have if you can have just one (no need for a bag, it fits your pocket). But assuming the 45mm f1.8 will be good,I think I will go for the 16 + 45 combo if I need to choose two (for Street Photography, this combo is very promising).
Now for those that prefer zooms, the NX system should IMO no wait too long before covering the same 16-45 range with a bright f2.8 lens.