- Corrected finder image makes photo composition easy.
- Each lens is optimally tuned to achieve reliable correction.
- Image information captured by the AF and metering sensors is corrected with in-lens VR.
- Patterns of image blur are not the same with all lenses.
Click on the link above to read the entire article and expand on the four bullets above.
Also, here’s an interesting video showing what Vibration Reduction (VR) does inside a lens: