Diagonal lines are also important when things are moving in the frame. Avoid horizontal movement across the frame—for the reasons already discussed. Instead the goal is diagonal movement.

TOWARD/AWAY

There is a surefire technique to ensure this always happens: make sure the object moves toward or away from the camera.

Get close to the object's path and let it go right by the camera. The result is a quality, dynamic shot.

In the sample shot at the right, the couple passes within a foot of the camera. Because they’re close, it’s a more dynamic shot. But people tend to give cameras a wide berth, so direct them to walk close.