there is only one 45mm NX lens.

I did some reading last night and I think the 3D 45mm lens is one and the same as the 2D version. this might eliminate the possibility of having 2 45mm lens which doesn't make sense in the first place. from what I read, the 3D function is activated when needed by the user and some lens group would move to create a 3D image.

I guess this is the reason why the lens is going to be released later than January. possibly some modifications made on the floor model last year. if the price is still the same, this would be a good thing and makes the lens unique than others. could be a start of a new trend other than the already existing software rendered 3D images. not sure which would be better.