Originally posted by jaad75
Stavri, have you actually looked at fullsize images? I don't say the lens is not sharp, I say those pictures are not focused properly (the only one that is, is the second one).
On the scale of difficulty "action pictures" of sports sit at the top of the list, with BIF, wildlife and so on. You need to invest in a lot of accessories and years of experience to minimize user error and perfect the shots. To me the submitted shots (given the poor overcast lighting conditions are very good-excellent)
Some opinion on auto focus performance. The AF algorithms in lenses from Canon and Nikon don't try to nail perfect focus teach time, in the equation where the variables are
speed and
absolute focus accuracy the speed variable holds more weight then the perfect focus variable by a large degree. Modern AF lenses especially in action photography try to freeze the action within a acceptable tolerance that's their PRIORITY, not the "count you eyelashes in every picture" kinda of focusing. Arguably (we have had this conversation before in the forum) Pentax algorithms are optimized towards better focus at the expense of speed. This is one of the reasons why pentax lenses seem indecisive and hunt more then canonikons lenses. In lens talk Canonikon lenses tell you each time...."don't you worry brah,....i got this, every ef'in time...(fistbump)".............while Pentax lenses go..." let me double check, make sure I really got this...."