367❚❚ Vibration Reduction (VR)The lenses described in this section support vibration reduction(VR), which reduces blur caused by camera shake even when thecamera is panned, allowing shutter speeds for DX formatcameras to be slowed by approximately 3.5 stops (AF-S DXNIKKOR 18–105mm f/3.5–5.6G ED VR and AF-S DX NIKKOR 18–200mm f/3.5–5.6G ED VR II) or 4.0 stops (AF-S DX NIKKOR 18–140mm f/3.5–5.6G ED VR) at maximum zoom position(according to Camera and Imaging Products Association [CIPA]standards; effects vary with the photographer and shootingconditions). This increases the range of shutter speeds availableand permits hand-held, tripod-free photography in a wide rangeof situations.To use vibration reduction, slide thevibration reduction switch to ON.Vibration reduction is activated when theshutter-release button is pressedhalfway, reducing the effects of camerashake on the image in the viewfinder andsimplifying the process of framing thesubject and focusing in both autofocusand manual focus modes. When thecamera is panned, vibration reductionapplies only to motion that is not part ofthe pan (if the camera is pannedhorizontally, for example, vibration reduction will be appliedonly to vertical shake), making it much easier to pan the camerasmoothly in a wide arc.Turn vibration reduction off when the camera is securelymounted on a tripod, but leave it on if the tripod head is notsecured or when using a monopod.
