The difference between optical zoom and digital zoom
Source：24小时微信小妹快餐_本地附近站衔女_上门卖身电话100元2020-06-04
Optical zoom: the focal length becomes larger, the total number of pixels does not change while zooming, the image definition will not decrease, and you can see farther. Digital zoom: The focal length remains the same, the total number of pixels is reduced while zooming, and the image definition is reduced, only electronic zooming.
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