The 12-24mm f/4-5.6 ED and 45mm f/1.8 are compatible with Samsung’s i-Function button.

Specs, as supplied by Samsung UK:

Samsung NX Lens 12-24mm F4-5.6 ED
Focal Length   12 – 24mm (equivalent to 18.5-37mm in 35mm format)
Elements in Groups   10 elements in 8 groups (2 Aspherical lens, 1 Extra-low Dispersion lens)
Angle of View   99.0°- 60.7°
Aperture   F4 – 5.6 (Min. F22), (Number of Blades : 7 , Circular Aperture Diaphragm)
OIS   No
Minimum Focus Distance   0.24m
Maximum Magnification   Approx.0.14X
i Scene   Backlight, Landscape, Sunset, Dawn, Beach&Snow, Night
Lens Hood   Yes (Included)
Filter Size   58mm
Mount Type   Samsung NX Mount
Dimension (DxL)   63.5 x 65.5mm
Weight   208g (without hood)

Samsung NX Lens 45mm f/1.8
Focal Length   45mm (equivalent to 69.3mm in 35mm format)
Elements in Groups   7 elements in 6 groups
Angle of View   34.7°
Aperture   F1.8 (Min. F22), (Number of Blades : 9 , Circular Aperture Diaphragm)
OIS   No
Minimum Focus Distance   0.45m
Maximum Magnification   Approx. 0.13X
i Scene   Night, Portrait, Beauty shot, Children, Backlight, Sports
Lens Hood   Yes (Included)
Filter Size   43mm
Mount Type   Samsung NX Mount
Dimension (DxL)   62.0 x 44.5mm
Weight   115g (without hood)