The quietness and smoothness of the 18-135 STM's image stabilization implementation make it especially well-suited for video capture. This IS system is silent – I don't hear any IS sound even with my ear next to the lens – the T4i's in-camera stereo mics do not pick up IS sounds. It is also well behaved – IS does not cause the viewfinder to jump – also helpful for video capture. As always with in-lens IS, the photographer is presented with a stabilized viewfinder (or LCD). This makes subject framing easier – and makes your photography a more pleasant experience.
With 2 years warranty.