Summary: the image resolution with 20 MP and improved sharpness in menue is really impressive.I never had so sharp digital images. excellent color rendition, very nice bokeh and high contrast. very content with my item.
Pros: excellent set lens, nearly no CA's, very sharp stopped down to f 8
Cons: wide open a few week in the corners, the AF slow in darkness (perhaps a cam problem)
Excerpt: This lens is the kit lens on several NX cameras. It's far from an ideal starting point and would be a poor purchase on it's own. Firstly, the zoom ring is incredibly stiff and unlocking the lens is a huge pain. Focus is slow and this lens does not focus very close. I got the 20mm f2.8 and I havn't felt the need to use this lens ever again if for no other reason than the trouble it's poor build causes when I want to take photos.
Summary: Optically it is not perfect, but still better than the kit zooms I use regularly, the Nikkor 18-55mm (first version), the 18-105mm, or the Nikon 1 10-30mm. Very compact and tight, but mine has a mechanical fault, sometimes it is not able to set focus and switches off the whole camera, apparently due to a speck of dust caught in its mechanism. But I am rough with my gear.
Pros: Very sharp at the wide and, acceptable at the long end
Summary: Only the new Panasonic kit for the Gm1 is better outside of the fancier(and far more expensive) Olympus kits like thier 12-50mm. If you're going to be shooting static images in good light this is better than the 18-55 samsung kit lens. Still for as nice as it is, long term, you're better off skipping both kits and getting the excellent 30mm pancake first and using the $150-225 you'd spend on this on the 50-200mm zoom or maybe the 60mm macro.
Excerpt: Very much enjoy this lens. Very clear and performs well and lowlight situations. The only downside, is that it does not have a function button like many of the other Samsung lenses have. No big deal though.