I know that's a early call to start to make assumptions. For what it seems there's only a few pre-production units out there but I assume that they will not change much from there.
Picking up from the images that I've seen online it seems a good addition to the market. For the price tag I can see many indie filmmakers building their own set. Reliability is unknown and we'll see if they pass the test of time.
Comparing it to Zeiss CP.2 lenses (based only on what I've seen on the web), I find that CP.2s have an advantage in term of color rendition. Skin tones are rendered more neutral and beautiful in the Zeiss system than in the Rokinon one. I also find the bokeh more nervous on the Xeen lenses, especially when full wide open.
On the other hand, and relying on the tests I've seen, it seems that the Korean brand has less contrast than Zeiss. This can be an advantage in cheaper cameras which have a more restrict dynamic range to work with. They don't flare as well. Personally I'm very fond of the flare characteristics found on Zeiss lenses but for others that don't like their lenses to flare Xeen could be a good choice, and a cheap one. They also seem to breath less than CP.2s.
All in all we're talking about half the price for Xeen lenses when compared to Zeiss. One can build a full set of 6 primes with the same cash spent on a 3 set from Zeiss. Curiously Sony has cut the price of their Cinealta lenses since no one has any interest on them. Let's see how Rokinon will turn out.
Edited by Alexandre de Tolan, 12 January 2016 - 02:52 PM.