Excerpt: I bought this lens new with my K-5 II. This was my first Pentax camera and Lens and I can say this is a great lens for the money. My previous system was Canon and I did have a few L lenses (only f4 lenses). Obviously, this lens won't beat out a L lens in sharpness or build quality, but I can say it does hold its own.
Excerpt: I got this lens to replace the 18-55 kit lens that came with my *istDL. It works quite well as an everyday lens and is the one I use most of the time. I keep it on my camera and always have the camera handy for when a photo opportunity pops up.
Pros: Good everyday lens, weather sealing.
Cons: Could be faster, the 3.5-5.6 maximum apertures are slow.
Excerpt: This lens is not that easy to use. Because it is slow, I can easily get soft images because of shaking. But I never had anything close to the bad one shown below. May be there is some kind of big sample variation. One or two stops down, it provided me with sharp images when the scene has enough contrast. Sharpness is not to the level of my M50's or FAs but it is not bad. The numbers given in photozone agree with what I see.
Pros: WR, quick shift, CA, bokeh, light and very cheap
Excerpt: If I had to choose the best lens in Pentax line-up, this was one of those. Yes, there are sharper and better lenses, but for the money there is no such lens as this (even in other camera manufacturers line-up). For valuewise, this is best kit lens available. Should be no brainer for everyone buying Pentax.
Excerpt: I generally find photo forums to be a great resource - not least this one - but sometimes get annoyed when reading them (don't we all sometimes?). But few things annoy me more than people slamming the kit zoom, I guess just because it is a kit zoom. This. Lens. Does. Not. Deserve. It. Ok, rant over.
Pros: Weather sealed, overall good IQ, very good build for a kit lens