Excerpt: With an APS-C sensor, as on my Pentax K-30 and many DSLRs, this is a mild wide to serious tele (it would be way wide to mild tele for a full frame). My experience agrees with the consensus of reviews I've read, that the features are nice but image quality is less than one might hope. In fact this zoom range is very convenient - with one lens you can shoot almost any common situation.
Pros: Easy To Use, Quality construction, Water resistant
Excerpt: I haven't owned many lenses but this is by far the worst. I returned it after 2 weeks, and I was stunned how bad it was. Throughout the range you get kit lens sharpness, and 135mm is mush. Distortion is apparent at 18mm and the midrange. Bokeh is harsh. The autofocus and the wr is a plus, but really this is a kit lens with a long end, and is worth around $200.
Excerpt: The structure and operation of this lens are without issue, my major observation is that this lens creates significant vignetting on all f/stops below f/11 on my K-5! Here's how to check this and prove to yourself for this lens or any other. 1. Set your camera to Aperature Priority Av and prepare to take a series of exposures from f/3.5 to f/22. 2. For this series, set the lens to manual focus and focal length to about 35mm zoom.
Excerpt: On the positive side of things, first I should mention is its build quality. I own DA* 16-50 and the build quality of this lens is comparable. It also looks at its place on the K-7 and balances it good. It is small, lightweight yet sturdy lens.
Excerpt: Bought this new in late Feb. 2011, After using it frequently this summer (my better half prefers the versatility and AF), I found myself giving up on this one, it's a nicely built lens and balances out well on the K-5, but the soft corners, and heavy barrel distortion, and vignetting, AND CA's... and and and. Eventually I found myself just taking this lens off when I go shooting and throwing on any of my other lenses.. even my broken Takumar-A 28-80 Macro is better IMHO.
Excerpt: For the price and after some of the reviews I've read, I expected better from Pentax. The tests and images I've taken so far show noticeable vignetting -especially with white backgrounds- and noticeable PF from 18-55 and noticeable CA from 55-135. The resolution and image quality is actually poorer than the kit SMC 18-55 DA II that came with my k200D. My old Vivitar zooms have better resolution and the Vivitar 75-205 close focus shows no PF and slight CA in comparison.
Pros: Easy To Clean, Fast / accurate auto-focus, Lightweight, Nice Bokeh, Strong Construction, Very quiet focus, Weather resistant
Cons: CA in tele, Expensive, PF at wide angles, Soft at 135, Vignetting
Excerpt: Когда покупал зеркалку от PENTAX, имел ввиду, что
Pros: Хороший диапазон фокусных.
Cons: Очень большой разброс разрешения по полю кадра, притом несимметричный, особенно на открытой диафрагме. Плохая светосила. В общем в диапазоне фокусных китового (18-55) объектива ничем не выигрывает. Жалею что купил его за 22т.р. Избавился от него. Если такой экземпляр достался только мне, то очень сожалею, что любимая мной "PENTAX" так опустилась в плане качества своей продукции. С учётом теперешних цен, цена его должна соответствовать качеству и быть вдвое ниже, - нап...