A handy tip once given to me………

When panning with an autofocus camera, set the camera to focus continualy. My D70s will focus once only when the shutter release is put down half way but if you set it to AF-C mode it will continually focus with the shutter release depressed.

The problem with panning is if you press the shutter at the beggining and wait a second or two then the subject can be out of focus, this is due to the ‘arc’ of panning and the focal distance changing.

Regards

John.