I realize that a lot of people here hate Pentax Forums, but you might want to take a look at these showing the K-3 AF performance. Birds in flight (BIF) are very challenging, as I'm sure most of us already know.
Thread 1: https://www.pentaxforums.com/forums/172-pentax-k-3/241522-k-3-bird-flight.html Thread 2: https://www.pentaxforums.com/forums/172-pentax-k-3/241586-my-k-3-af-experiences.html -- Nothing is sure but death and Pentaxes. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.

