Summary: As an amateur nature photographer on a budget, I had high expectations on this lens, after all, it is a Pentax, right? The reviews were positive, even comparing it with the DA 55-300 in image quality, minus the weather resistant feature. Same optics, but plastic make, nothing could go wrong. After my first outing, I noticed the lens was soft, very soft, even at the low end. Next day I fine tuned the focus, it was a front focuser, and needed serious adjustment.
Summary: This is nice to have in combination with the Pentax 18-55 mm WR and a K5 or K5-IIs for use in inclement weather conditions. The two lenses cover a wide range -- 18 - 300 mm -- for just about anything that comes up.