Originally posted by ThorSanchez In my experience with a K-3ii using anything but center-point autofocus coupled with back-button focus for action subjects is a lesson in frustration. In almost a decade of using the K-30 and K-3ii and all kinds of configurations and settings center-point and repeatedly pressing back button is the only way to get an acceptable keeper rate shooting team sports, and I still accept that that moment with my kid doing something cool may well miss focus. This is the primary reason I'm looking forward to the Mark III, a dramatic improvement in not only the accuracy and stickiness of non-center point autofocus, but also the processing speed to keep up with moving subjects.
This pretty much sums up what I have to do when using my friend's K-3II & DA 55-300mm PLM. Don't get me wrong. That lens can focus very fast, but the camera just can't figure out what it's tracking, especially if the background is busy. Using AF.C & all focus points results in way too many non-keepers. You just want to fling the camera a mile away in anger at times. I'm not even going to get into the K-50 AF issues.
I really hope that the K-3III can finally track a subject reliably.
Point the AF point on subject & the camera now follows it tenaciously whether you move, the subject moves, or both of you move while constantly driving the lens to keep the subject you have chosen in focus in all X, Y, & Z directions within any busy or non-busy background. With the K-3II it's like, point AF point on subject & the camera's like,
"I think I'll focus on whatever I want. SQUIRREL!" Hahaha!
Not to mention that quite often you don't know what the camera is focusing on with the AF points that light up very briefly.