Is digital zoom better than optical zoom?

Optical zoom lenses are much superior to digital zoom lenses. With an optical zoom lens, the lens physically gets longer during the zoom and optical glass elements move to change the focal length. With digital zoom lenses the effect is created through an algorithm.

When you zoom, the computer calculates the percent of enlargement and selects part of the image and essentially creates an enlargement on the view screen. This is why they sometimes seem to jump during zoom since there is a delay created by the computer calculation. Digital zoom images may appear unclear or pixilated since they are essentially enlargements rather than a physical change in the focal length of the lens.

Keep in mind that many compact digital cameras have both optical and digital zoom. You want a camera with as large an optical zoom as possible in the cases of these cameras. All DSLR zoom lens are optical zoom lenses only.

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