>>Once programmed for AF-On, also set your AF Mode to >AF-C. >> >>Now, your thumb can perform manual focus (don't press >it), >>single-servo focus (press and release) and continuous >focus >>(press and hold) in parallel with the shutter release. >For VR >>lenses, this also allows focusing to occur without >engaging VR >>each time. It may take a day to get used to it, but most >love >>it once learned. >> >> >I have read that a lot of sports shooters prefer AF-on. Does >it perform focusing better in anyway? >I never understood why people would use it<
Answer: For one thing holding the AF-ON button allows constant focus while taking multiple shots when you are tracking a subject. It does this for you whether you are taking stills or movies.