As this lens is currently not supplied directly by Amazon, I was forced to order via a third party. Their service was good and the lens was received within 72 hours of placing the order.
This lens shares a similar design and build style to that of the standard 18-55 kit lens. The mount is metal but the body is essentially plastic. In terms of weight, the lens is much lighter than expected even though I have similarly constructed lenses of other brands and of similar effective range which are significantly heavier. Were this lens made by Sigma, it would be around double the weight! The lens is supplied with both caps and a plastic, fleck-lined hood. Also supplied is a soft pouch which you may use or not as you wish. The lens accepts a modest 52mm filter, which is curiously 2 sizes smaller than that for the standard kit lens.
In an initial test shoot, where there was very bright sunshine in the more open environments, I could not see any flare even when shooting more or less directly into the sun with the hood in place. The day was quite breezy and there was some dust in the air and I did not wish to chance shooting without a hood or a protective filter in place. Some shots were taken either indoors or under partial cover and included a mix of daylight, fluorescent, halogen and sometimes tungsten bulbs which would severely challenge the colour performance of most cameras but there were no obvious nasty colour rendition issues to be found.
Other than focal length markings, there is no more. The lens is fitted with the usual AF-MF switch to control how focussing is done but the zooming is manually controlled. The IFn button is close by. The lens action is also similar to that of the kit lens, smooth but not silky and focussing is quite fast and accurate. There is a tendency for the lens to over-focus a little and then to fine adjust quite quickly. Focussing appears to be solid and accurate, if not as snappy as would be wished. It is not sluggish or slightly slow, but about the same as other cameras or very marginally faster.
The optical performance of this lens is really excellent if not superb and would easily match a similar lens from one of the major manufacturers at a fraction of the price, and that is also true of the kit lens. I could not easily spot any fringing due to chromatic aberrations even when zooming in to in excess of 200%. However, I had previously taken a couple of test shots using JPEG Super-Fine only but failed to reset the Quality setting to RAW + JPEG which I would normally use and it is possible that the camera's software auto-corrected any fringing effects.
Despite a degree of doubt, not having any prior experience with Samsung cameras or lenses, I am very impressed with the performance of this lens and I may yet add a faster prime lens (the 30mm, perhaps) for those situations when the more modest maximum aperture of this is too slow for some lighting situations. My impressions, although brief, appear to be matched by those of several trade or expert reviewers which seems to indicate that lens quality may be closely maintained from one unit to another - not always true, even with more expensive brands.
As I did not obtain any RAW images on this occasion (my error), I will make another attempt when possible.
For its price, the lens is a brilliant performer and far exceeds expectations. As it will work with any Samsung camera sharing the NX mount, if you have such a camera and are thinking about buying, stop thinking about it - order one! You will not be disappointed.