A cameras zoom lens covers the focal-length range 38mm
A camera's zoom lens covers the focal-length range 38mm -138mm . You point the camera at a distant object and photograph it first at 38mm and then with the camera zoomed out to 138mm . Compare the sizes of its images on the two photos.
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a cameras zoom lens covers the focal-length range 38mm -138mm you point the camera at a distant object and photograph
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