Since April 2013 I am in possession of a K5 II. I bought the camera kit with 18-55 WR. Now the idea was to, another better lens to buy, which has a good brightness and a pleasant telephoto. The idea was just to 18-135 WR, which unfortunately has not so good reviews and the price here is not without. The Pentax 55-300 Then I caught her eye. Due to the many positive reports and opinions, I then ordered me this lens. Yes, what can I say, the entire zoom range, the lens forms sharply. Even at 300 mm and from the hand of the photos are better than me. Although the lens does not have stability, but the Body. I've been in a cathedral (relatively dark) pictures taken with ISO 2500, since a flashlight would have made no sense. The pictures are still really neat. With a maximum aperture of F4 beginning 55 to about 105 mm one has enough light reserves. Sure, a lens with F2.8 would be better, but firstly hardly affordable and as an amateur and not mandatory for me the most consistently. Processing I find very well, the autofocus of my applications (not sprint or animal photos) is fully sufficient. The only thing that rattles a bit, is the lens hood, but is a minor matter. The weight and size for a telephoto focal length with this I feel compared to telephoto lenses from other manufacturers as small and light. For the price and the really good picture quality I give a strong buy recommendation.