Excerpt: I bought this lens to supplement my other lenses. I already had a number of primes and a couple zooms but found myself shooting more and more in harsh environments so I got this lens. Unfortunately I couldn't afford one of the da* lenses in this range but I'm very happy with the 18-135.
Pros: Weather sealed, handles well, sharp stopped down, and color rendition
Summary: I wanted a little longer zoom, and this does pretty well. I think it will serve for a decent everyday lens. I find it slightly annoying that it zooms out as I carry it, but it's not really a problem. Nice that it's weather-sealed.
Mostly a great lens but optical quality is middle of the road
S. Vogt, Amazon
18 July 2013
Summary: The 18-135 WR lens is probably the most affordable, and versatile weather-proofed lens. It's a good starter lens to purchase in a kit with your K-50 or K-5 II/IIs. But, let's be clear, if you buy this lens expecting superb optical performance, you might be a little disappointed. It's not a terrible lens, but it gets rather soft at the telephoto end. It is quite sharp at the wide angle. And I have gotten some superb photos from it.
Summary: The DA 18-135 is a fine lens in its price category. Weather resistant, quiet and quick focus, paired with the Pentax WR bodies it's a good choice for travel. Unfortunately, the seller, Sunset, is parting out lens kits which don't include the hood - this is not apparent in the ad. If that suits your needs, the price is acceptable. The misleading ads are not.
2 weeks and I think it will be my walking around lens
29 June 2013
Summary: Its not perfect, its not stunning, but its a solid walking around lens with WR. Since I wanted a WR lens for my WR camera there were only a few options. The Pentax 18-135 seems to fit the bill nicely. The zoom is great, the focus is rather quick. Slight noise in the motor. My biggest issue is with the vignetting at wide-angles. Very noticeable when shooting against a monotone background.
Excerpt: This is a solid performer. It is well made and of high quality. Image quality is good, but has some limitations. But nothing more than expected from a lens of this type. Biggest drawback is its rather small aperture of only f/5.6 at the longest focal length. But I have no problem with recommending this lens. If you want a super zoom, this is probably the best one available for Pentax.
Excerpt: Really sturdy, practical lens with an ideal (for me) zoom range. If you've never had a lens with a DC motor, it will astound you how silent it is. The biggest issue is zoom creep, which happens any time I walk around with it. Too bad they didn't include a lock button.
Summary: This is a companion to my Pentax K-5 IIs I also recently purchased. I wanted a good well rounded lens, capable of handling most jobs. And this delivers. I wouldn't call it a pro lens by any means, but it can get very satisfactory images out of it. For everyday street photography, it works great.