Excerpt: This lens works very nicely when shooting wildlife with a Pentax K-50. I am amazed how well very tightly cropped photos hold up with this combination. Autofocus is sometimes an issue in some situations for me, but I am able to switch easily to manual focus to get the shot. I normally shoot RAW+jpeg.
Excerpt: Bought this lens used in almost perfect condition a few days ago so this is an early review. Also, I painstakingly adjusted the micro focus before use. On my camera it was a +6 which is pretty normal for this camera.
Pros: Wow, very sharp. Easy to handle. Pretty fast to focus.
Cons: Not as fast as HSM/Ultrasonic motor. Usual sound of screw drive.