ACalculating Angle of View

The size of the area exposed by a 35mm camera is 36 × 24 mm. The size of the area exposed by the D7200 when DX (24×16) is selected for Image area in the photo shooting menu, in contrast, is 23.5 ×

15.6mm, meaning that the angle of view of a 35mm camera is approximately 1.5 times that of the D7200 (when 1.3× (18×12) is selected, the size of the area exposed decreases, further reducing the angle of view by about 1.3×).

35 mm format picture size (36 × 24 mm)

Picture size when DX (24×16) is selected for

Image area (23.5 × 15.6 mm)

Picture size when 1.3× (18×12) is selected for

Image area (18.8 × 12.5 mm)
Lens

Picture diagonal

35 mm format angle of view

Angle of view when DX (24×16) is selected for Image area

Angle of view when 1.3× (18×12) is selected for Image area

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