jamesino
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A sample binocular measurement would consists of: magnification x objective diameter, eg. 3 x 60.
Suppose my binocular is 3 x 60 (3x magnification), what would be the equivalent focal length I need from a telephoto lens to achieve the same degree of magnification?
Suppose my binocular is 3 x 60 (3x magnification), what would be the equivalent focal length I need from a telephoto lens to achieve the same degree of magnification?