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.
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!
Summary: I purchased this lens along with the 50-200 to use on a K5 body I bought on ebay. My thinking at the time was buy two inexpensive lenses to cover this range 18-200. In hind sight I should have spent a bit more money and bought a lens with SDM focussing and more substantial build qualities. Although this 18-55 is good value and captures good images, I find the focussing a bit clunky. It is good value and ideal for one of the Pentax DSLR's lower down in the line.
Summary: Very useful focal range. Can take pictures of most anything in any harsh environment. This lens if perfect if you don't want to ruin a prime lens or any of your expensive lenses. At the extreme points of the focal range you will find some distortion or vignetting, but its nothing worth complaining about unless you are a perfectionist or professional. I have used this lens in the rain and in the absolute cold (Mongolia). The lens is still giving me great shots.
Summary: I bough this item to get a standard lense and taking regular pictures. It is easy to operate and results are good. Automatic focus work well. I use it on a K20 pentax. The result is a camera with a total weight less heavier to handle than larger lenses when taking standards pictures.
Inexpensive lens with great build quality and surprisingg IQ
Bernard Dery, Amazon
4 December 2012
Summary: I got this lens in order to have a really weather resistant kit (WR lens +K20D). My main lens will remain the Sigma 17-70, a better lens in most respects. The WR kit really is a cutie, small, light and well made. I expected a much cheaper feel. The body seems built with tight tolerances (expected for a WR lens), the action of the zoom and focus rings are well damped and responsive. This is my first DA lens and I am impressed at its quality.
Summary: Das Pentax DA 18-55 AL II ist der Nachfolger des esten Kitobjektivs, welches schon an den 10 MP der K10D, K200D und 16 MP der K20D überfordert war. Das Kit ist ähnlich gut verarbeitet wie der Vorgänger und ist nur durch die rote römische 2 von jenem zu unterscheiden. Wie schon der Vorgänger fühlt es sich wertiger an, als die Versionen von Canon, Nikon und Sony.