Originally posted by Al_s14 Wounder if Pentax 55-300 is just slow. Sometimes i loose mad time waiting for it to do its thing. Literary takes seconds between shot series
It is slow. I have one, and it can be very annoying, as with any slow lens (slow in the aperture sense - at 300mm the best you can do is f/5.8, too slow for reliable AF). My solution to this is listed above. I have switched my camera to use only the [AF] button to autofocus. That way, I can focus on something that is at the right distance for my subject and just shoot as if the camera were in manual focus. I do miss some shots because I forget to press the AF button, but getting less and less over time. It's a matter of getting used to using the thumb instead of the forefinger for AF, and like all muscle habits, it needs to be done over time to train the the brain to use the thumb rather than the forefinger.