我用9点连续对焦

I tried 尼康的51点3D连续对焦. Once it locked on, it is very good. However, when the horse is coming, my D300 does not always lock on the horse first. The first couple frames were all off focus in several trials.

Depends on the speed, at 1/50, I would get about every other frame in focus with 9点连续对焦 on fast running horses.

YMMV.