The NX30 is visually similar to its predecessor, the Samsung NX20, but is more advanced and has a fast hybrid autofocus which Samsung claims can detect an object in only 80ms.
[1] Another significant changes are a much more powerful processor which makes the camera far more responsible and faster, a much larger body with very good ergonomics, better video quality and capability (Full HD 60 fps, and a better codec), enhanced wifi connectivity, touch sensitive flexible display, and a large fast viewfinder with unique tilt construction.
Although nearly the same sensor was used, the NX30 has improved ISO range,[2] the older sensor lacks a bit against modern competitors on high sensitivity but is capable of delivering very detailed images with Samsung lenses.
This model was a much needed improvement after the somehow sluggish NX20, with only minor negatives, and the price was dramatically lowered after some time.
This camera-related article is a stub.