I once shot a baseball tournament with my *ist. I had lots of baseballs hanging in the air right before being hit by the bat or being caught by a fielder, with all the related expressions etc. I'm just scratching my head here.
On my wall is a picture of me breaking out for a 66 yard touchdown run, taken in 1966 by a guy with a 4x5 film camera. A sports reporter with the Toronto Globe and Mail set up the camera for where he thought the play might go (based on his clearly superior experience) , waited for me to get to the spot he'd focussed on and took the picture. He also got a great shot of my fellow running back stiff arming a line backer.
And here we have folks whining that they can't get what they want with a modern DSLR.
I'm going to hold back here and just say that's messed up. OK, no I'm not.
You suppose any of these guys would want to sign up for classes in how to do sports photography? I mean how serious are they? Sounds like there might be enough market to formulate a business plan. At least every whiner on this forum can't shoot sports without a D500 or something.
Lesson one, sports for single frame shooters. Because honestly folks, if you can't shoot single frame you can't shoot sports. You always have to get the first frame in focus and the camera locked on your subject, no matter what you shoot. Those of you are thinking you can pick up that first frame lock just willy nilly, pointing your camera all over the place are mistaken, which ever camera you use. After that, I could say, like Pioneer, I know I would get more keepers renting Nikon or Canon gear..
But that begs the question.. why do you need more shots? One of my friends works with a company in Ottawa that makes a lot of money selling prints of kid at hockey and soccer tournaments. So, that makes him a pro... he shoots with a 6D because that's what he can afford right now. Honestly, what is the matter with people. He can work professionally with a 6D, and you can't get it done with your Pentax. Oh, ya, he went to a year of Photography at Carleton. Photography is a trade. Sports photography requires learning technique. Buying equipment is the easy, and least necessary part.
What do you folks think people did before there was any AF? Do you really think people just took flowers.
If you can't get 10-20 good images with a Pentax and a long lens, your problem isn't you camera's focussing speed. If you did get 10-20 images at your last event, do you really need more and why.
The first thing most people do wrong is, the spend way to much time watching the game and not enough time pre-focussing where the play might go. The mindset has to be, this is a job. If you're going to a sports event and you're thinking "I'll just go take in the game and snap a few photos when I get a chance", well, that isn't a professional attitude, and you aren't going to get professional results, and you don't need a professional camera, whatever the heck that is,
That's why you don't get keepers, not this camera AF stuff.
Now if you master the art of capturing the moment a sports events , like my friend does with his 6D, and someone comes along and says "You're really good at this", and offers you more money for doing bigger events, then maybe you think about a better camera. I get tired of all these self proclaimed photography sports shooters, claiming their gear isn't good enough. It is really, really old. Dude, you very likely suck at shooting sports and a better camera will just produce more bad pictures. My apologies to the guys who really do have good technique and do fine with their Pentax gear, but really would benefit from something a little faster focussing. Just 9 out of 10 of these types of complaints aren't you guys. Most of these "the AF isn't fast enough for me" type complaints are posers.
The question that should be asked before asking about Pentax AF, is "how good/bad is my sports shooting technique." With the corollary question, "Are my techniques, level of need and pocketbook developed enough to justify spending a lot more money on a faster AF camera and lenses?"
No one ever asks that. They just want to know who has the fastest AF.
Posers.