Considering the k10d but don't know if the 3fps will be enough for me as I'm a relative newbie at sports shooting therefore need more margin for error. haha.
All depends on what you wanna achieve. If you wanna take some flying/running sequence shots, 3fps might not be good enough. But for general shooting, should be okay:
http://www.eng8.nus.edu.sg/FileStorage/Frank/Photos/Rugby2005/IMGP1697_small.jpg
http://www.eng8.nus.edu.sg/FileStorage/Frank/Photos/Rugby2005/IMGP1751_small.jpg
http://www.eng8.nus.edu.sg/FileStorage/Frank/Photos/Rugby2005/IMGP2027_small.jpg
http://www.eng8.nus.edu.sg/FileStorage/Frank/Photos/SingaporeHSBCWakeboard2006/IMGP3409_s.jpg
Even the DA50-200 can take some nice sports photos:
http://www.eng8.nus.edu.sg/FileStorage/Frank/Photos/SingaporeHSBCWakeboard2006/IMGP3537_s.jpg
Here is a "quite a newbie" comment.
I read from a book about shooting sports. Well, there were clearly certain points which seems reasonable such as the range of your lens and the "speed" of your lens. And usually for pro, they would have 2 bodies with different lenses attached to capture the action.
So I feel that it is other than considering the rate of FPS, but you may also like to consider which are the lenses you are going to bring along.
Please correct me if I am wrong or should anymore be added
That's because the sports photographer is paid to get the shot and can't afford the time to change lenses in the midst of the action, hence 2 bodies. Secondly, they would be working from a vantage spot and would rely on a particular lens to cover the main angles with the second body/lens combo covering other types of supplementary shots.
A faster frame rate is half the story in action photography, unfortunately gearheads overemphasize on all things equipment (5 fps vs 3 fps, blah, blah). The ability to anticipate peak action is the key to successful action shots but this important fact is usually ignored.
Anyway the TS has stated elsewhere that he bought a used D200. :what: Apparently doesn't know useful Pentax's SR is, especially with long teles.
Considering the k10d but don't know if the 3fps will be enough for me as I'm a relative newbie at sports shooting therefore need more margin for error. haha.
I think AL focus is pretty good already. Photography is not all that convinient. Even 1d mark III can shoot so fast with relatively superb AF accuracy, it is still easy to miss shots.
3 frames per second is good enough and after all, k10d is so much cheaper to be able to achieve so much.
I had a 1d mark II on loan for 2 months shooting inter school lacross competition. It is true that canon could get more shots but more winner come from pentax camera when the images are caught sharp and clear.
Does that help?