When I wanted to take a quick camera shot of the subject I was following, it seemed to be easy to use and fit comfortably in my hands.
In addition to being mobile in the hand-held form, it also delivers superior performance when installed on a tripod. The combined use of a "PENTAX K-3" camera and this zoom lens allowed for intuitive camera operation. It was enough to meet the needs of me taking photos of wild birds in many different settings.
think this 150 to 450mm lens is the best lens that I have ever used for photographing of wild birds. Use of a combination of different features, such as the very fast, maneuverable focus lock, the performance of K-3 shooting at 8.3 frames per second, and the AF buttons laid out on the lens, gave me many chances to immediately capture and record moving birds. I think its design is stylish and ergonomic that each feature is arranged for ease of use.
It can be compatible with and used for a broad array of subjects ranging from natural scenery to commercial ones, irrespective of whether they are landscapes or animals. It is small enough to fit in a camera shoot bag but offers images of the highest quality."