Originally posted by Oldbayrunner On another note I don't use the shutter for focus on my k5 lls anymore and have switched to mainly keeping it in Af.C and using back button AF for a number of reasons.
1+. Good point that should probably be top of the list of setting up for action. (I have this set in a sports "user mode")
Originally posted by milesy The 55-300 can take some super sharp images so I'm pretty sure there is nothing 'wrong' with the lens
Another thing to think about is shooting closer to target with a shorter focal length and incorporate a larger field of view
This can give you the advantage of greater depth of field/more time for focusing for a given f stop and iso setting.
The disadvantage is that you lose resolution cropping to suit but this is better than having an out of focus shot.
While I jokingly posted pics of what I use for sport shooting above, the lens I use for family shots like you posted is the DA 18-135.