Nikon D800E User Manual page 403

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Calculating Angle of View (Continued)

The DX (24×16) angle of view is about 1.5 times smaller than the 35mm

format angle of view, while the 1.2× (30×20) angle of view is about 1.2

times smaller and the 5 : 4 (30×24) angle of view is about 1.1 times

smaller. To calculate the focal length of lenses in 35mm format when

DX (24×16) is selected, multiply the focal length of the lens by about

1.5, by about 1.2 when is 1.2× (30×20) selected, or by about 1.1 when

5 : 4 (30×24) is selected (for example, the effective focal length of a

50mm lens in 35mm format would be 75 mm when DX (24×16) is

selected, 60 mm when 1.2× (30×20) is selected, or 55 mm when

5 : 4 (30×24) is selected).