The Samsung NX series was a series of APS-C mirrorless interchangeable-lens cameras (with the exception of Samsung NX mini that sports a 1-inch sensor) with Samsung NX lens mounts from Samsung Electronics, introduced in 2010.
The APS-C image sensors have a 1.54× crop factor. Optical image stabilization is featured on some of the lenses, indicated by an "OIS" marking. Automatic focusing on NX lenses is handled by a dedicated electric motor built into the lens.