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380 Technical Notes
❚❚Vibration Reduction (VR)
The lenses described in this section support vibration reduction
(VR), which reduces blur caused by camera shake even when the
camera is panned, allowing shutter speeds for DX format
cameras to be slowed by approximately 4.0stops at maximum
zoom position (according to Camera and Imaging Products
Association [CIPA] standards; effects vary with the photographer
and shooting conditions).
This increases the range of shutter
speeds available and permits hand-held, tripod-free
photography in a wide range of situations.
To use vibration reduction, slide the
vibration reduction switch to ON.
Vibration reduction is activated when the
shutter-release button is pressed
halfway, reducing the effects of camera
shake on the image in the viewfinder and
simplifying the process of framing the
subject and focusing in both autofocus
and manual focus modes.
When the
camera is panned, vibration reduction
applies only to motion that is not part of
the pan (if the camera is panned
horizontally, for example, vibration reduction will be applied
only to vertical shake), making it much easier to pan the camera
smoothly in a wide arc.
Turn vibration reduction off when the camera is securely
mounted on a tripod, but leave it on if the tripod head is not
secured or when using a monopod.