Pentax 21977 DA 18-135mm f/3.5-5.6 ED AL (IF) DC WR Lens for Pentax Digital SLR cameras,Black

A very, very useful lens. Surprisingly, 1/2" shorter than my already-compact Pentax 16-45 f/4! This one, with that 200mm-equiv zoom, is much more versatile. Came from 'Another Deal Site', fulfilled by Amazon... mentioning this because, unlike some older posts below, this lens came in a proper box, with Ricoh warranty cards, an instruction guide AND the lens hood. Exactly as shown on the Amazon page. If I were going on a trip, I would take this lens. Or as the best choice for a walkaround-town snapshot lens. Amazon calls it 'discontinued', which is confusing, since, as of today June 9 2015, it is also for sale on the Ricoh lens web page, though at $500. It is well-made, works perfectly and immediately with my K-5 IIs, and my older K-01. Does it take good pictures? Sure. Tell you a secret though... ANY modern lens takes great pictures... re sharpness and color rendition. What we are really buying is ergonomics... how easy it is to use the lens for a hurried once-in-a-lifetime snapshot. And that gets you over to the camera... and Pentax DSLRs... all of them... have excellent autofocus if there is any light at all in the scene, any contrasting area you can use as a focus point. This 18-135 WR also lets you focus manually with a lens ring, without having to turn off autofocus. Best of both worlds. Lastly, the WR means Weather Resistant. No, you can't take it surfing, or in a pool. But it is rainproof, and dustproof, and sandproof... particularly if you are using it on a recent Pentax weather-resistant DSLR, like the K-3s, K-5s, K-30, K-50, etc, etc. So few photos are taken in the rain... but you can!

I bought this lens as my one and only bad-weather zoom. Physically it is about the same size as my 18-250mm Pentax superzoom, but for what it loses (100mm plus of zoom at the long end), it makes up in the comfort of knowing it's weather-sealed, and I can face light drizzle with confidence and downpours with the knowledge that if I get inside soon enough, my camera and lens will not be destroyed or shorted out. Thus far I am quite happy with it - it offers enough focal length "span" for the tasks I bought it for (wide enough at the wide end; tele enough at the other), and more than adequate image quality. Handling is good, and manual focus override is quite reasonable with "quick shift" - the MF ring is nicely damped, making manual adjustment easy, or if you're moving from near to far objects (or vice versa) you can give the focus ring a twist and let the AF do the rest of the work. The inbuilt DC motor doesn't seem notably faster than screw-drive, but it is accurate when lighting is adequate (see below) and is generally much quieter where this is important. The lens is advertised as being incompatible with some older digital bodies (all *ist-D... series, K100D, K110D) as they do not support the inbuilt autofocus motor, so take care if you are buying a cheap body and this lens separately second-hand. The only problem I have had with it is I've had trouble locking focus sometimes. However, this has always occurred in quite low-light situations, where variable-aperture zooms like this one aren't at their best without strong focus-assist from an external flash (which I don't have). It really can't really be put down to the lens, which I seem to be pushing to its limits in low light on the K-5. If you can only have only one lens on your Pentax DSLR, this is a good choice, especially if you are travelling to wet and/or dusty places and don't want to fiddle with lens changes much. It doesn't give quite the range that the 18-270 does or quite the image quality that some of the other higher-end lenses do, but the weather sealing makes it an excellent practical choice, and if you use it well it will give you excellent results for amateur or enthusiast work. Especially if you're just getting into DSLR, this lens as part of a lens-body deal is an excellent option and will keep you going for quite a while before you need to consider anything else.

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This lens (for APSC cameras like the Pentax K series) is approximately equivalent in the full frame format, to the ubiquitous 28-200 zoom. What I like: small, compact, easy grab focus. Bokeh is acceptable, it’s loaded with compromises, after all. It’s lightweight but doesn’t feel plasticky; if you’re looking for that one travel lens, look no further! And yes, it won’t break the bank either..

This is the Swiss-Army Knife of Pentax lenses. When you can't bring the whole toolbox, this one you want. It can do almost anything well - or at least, well enough for the person who is only bringing along one camera body. It has the greatest zoom range of any weather-resistant lens by Pentax, so when don't want to miss a shot, but don't want to ruin your camera by changing WR lenses in the kinds of weather that necessitates them - this is the lens to have. It's not a "macro" lens, but with it on my old K-5 I have taken shots of a fly so clear I can see the hairs on its back. It's not a "super" zoom with 15x, but it IS a true WR lens, with seals where they make a difference. I have taken shots in the snow - as it came down. I have taken shots in the spray of water. It can take wide angle shots and then zoom in 7.5x and get a close-up. The "softness" in the corners is primarily at the longest end of the zoom range, so I use the normal-wide settings for landscapes, and that works perfectly. But if you're taking a people-picture, when you zoom in it is still very sharp in the center where the person's face will be - and so the "softness" in the corners is like a lovely bokeh treatment of a large aperture (expensive) lens. And if I'm using it instead of a 200mm lens to capture something far away, I'm going to crop out the corners anyway and keep the sharp center portion. The focus is reasonably quick and delightfully quiet. The build is quite solid, yet light. If you take photos at the beach, in the snow, in the damp, where the wind is kicking up dust and debris, water is dripping or children knocking over large tumblers of sugary beverage next to your camera gear - this is your lens, especially if you want to take landscapes, portraits, zooms and macros all with the same lens. There will be times you are very glad you brought this one along instead of a bag full of the expensive, Limited-use limited lenses to ruin in the weather.