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What is the difference between digital zoom and optical zoom?

Hi, Just wanted to know as above. My new powershot A540 has 3X digital/4X optical zoom. My friend's S3IS has 10X optical zoom. What do these terms mean?
- abhijit_reddevil
- Thread
- Apr 13, 2007
- a540 digital/4x optical powershot zoom
- Replies: 6
- Forum: QnA (read only)

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