Joseph Leotta , Jun 09, 2009; 08:36 p.m.
not necessary better, but it gives you a lot more lens options.
If you have a motor in the body you can use both type of lenes. ones with and without AF motors in them. Its very helpful if you have a number of Nikon lens without motors.
AF-s or Swm Autofucos lens have a Silent wave motor built into them. As a rule they focus faster and are easier to override manually and are silent.
Right now a little more that half the nikon lenes are afs. all DX lenes are AF-s as are all new lens that nikon introduces.
Aftermarket len companies produce lens both ways.