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|VR switch on a Nikon VR zoom lens|
image by Geoff Harrisson (Image rights)
Vibration reduction or Image Stabilization is a mechanism to reduce camera shake. It can be done mechanically, by shifting the lens (or a mirror in the light path), or shifting the image sensor, to follow movements. Alternatively, it can be done electronically, by shifting a digital image.
|Camera Shake Test Stand, the effect of VR mode|
image by Hans Kerensky (Image rights)