Summary: I'm not a pro photographer and I don't pretend to be one. I needed a wide lens and as my wife and I hike in all weather conditions, and the weather resistant feature is the primary reason I purchased this lens. The price was right as well. The camera body is a Pentax K-30. Autofocus works well and is accurate but could be faster. Images are sharp and rich in color. Distortion is evident but only slight in my opinion.
Summary: This lens came to me bundled with a new Pentax K-50. I hold onto it mainly for the 18mm side, which is pretty good for landscapes and architectural shots. Once you get up to 55mm performance seems to be average (f5.6) and not as sharp. The weather resistant feature is a plus.
Summary: I bought this lens as a lighter weight, travel, weather resistant alternative to my Pentax 16-45mm F4, which according to various tests, should be sharper. Using www.photozone.de test site as a guide, I shot some test frames with the 18-55 at F8, between the 'sweet' focal lengths of 28-35mm. Surprisingly, it matched or surpassed my other lens and is lighter and weather resistant to boot.
Excerpt: Though I dislike the filter thread being 52mm, the lens is a great wide angle lens for shooting scenes outdoors, and great for using for creativity. I would suggest adding this lens to your kit just because the build is strong, and well. The lens is not the best for shooting pictures of people because it is a wide angle lens and will make your subjects not as flattering. This lens does great for anything creative or artistic as well.
Excerpt: This is one of the least expensive lenses made by Pentax for their DSLR cameras, yet it's one of the most useful. Optically, it would score an "8" on the traditional 10-point scale. Slight barrel distortion is present at 18mm, but that clears up as you zoom to the higher settings. It is not the sharpest lens available, but for the money, it's plenty good.
Pros: Durable, Easily Interchangeable, Good bang for the buck, Good build quality, Lightweight, Rugged, Useful zoom range, Weather Resistance
Summary: This is a good, but not great (zoom) lens. Kit lenses are seldom, if ever primes. Which may be why I'm not extremely thrilled with it's performance. The zoom capability makes for a highly useful means to use your new camera. It isn't particularly fast, it isn't all that sharp wide open when compared to other higher end lenses, bokeh is so-so. I will say the focus speed is very fast in good light. All this said, one must remember (including myself) it is a KIT lens!
Excerpt: Very happy with this purchase for a fantastic used K20d I purchased with it. For pretty much a "kit" lens the construction is exceptional. Zoom is positive with no creep. Manual focusing is very fast to register with camera but the ring motion is a bit slippery, not as positive as the zoom. Both rings have a superb rubber texture and though the focus ring is a little small it is NOT tiny. Zoom ring size is great. Non-rotating ring is good to have.
Pros: Durable, Easily Interchangeable, Rugged, Strong Construction