Samsung Galaxy NX has a Samsung NX lens mount and currently there are 32 native lenses available for this mount.
Samsung Galaxy NX doesn't have a sensor based image stabilization system but 7 of these lenses already comes with optical image stabilization.
Since Samsung Galaxy NX has a APS-C sensor, it has a focal length multiplier of 1.5× so you have to multiply lenses original focal length with this multiplier to find the Full Frame equivalent focal length of the lens when mounted on Galaxy NX.
You may also also be interested in these:
Samsung Galaxy NX Lenses with Image Stabilization
Samsung Galaxy NX Lenses with Weather Sealings