Originally posted by totsmuyco Thank you Clackers and Normhead. I'll look into the threads you gave. I'm not that ecstatic with my results. Maybe it's my lenses. I use the 18-135 and the 55-300 WR. I get some good shots at times with the 18-135. But the 55-300 struggles a lot. .
As you say, lenses are very important, Totsmuyco. The Canon 85mm will be a notoriously slow lens even if you put it on a 1D X.
As I understand it, the Pentax 18-135 and 55-300 PLM are not slow focusing.
I can speak for the previous version of the 55-300 - I have shot runners with it on a K-x, but only to prove a point. It is f5.8 at the long end, and the AF system is rated only to f5.6, so I prefer my Tamron 70-200 for sports where possible. I have a 1.4TC in the bag if needed.
Last edited by clackers; 06-28-2017 at 05:11 PM.