ACalculating Angle of View

The D610 can be used with Nikon lenses for 35mm (135) format cameras. If Auto DX crop is on (0 90) and a 35mm format lens is attached, the angle of view will be the same as a frame of 35mm film (35.9 × 24.0 mm); if a DX lens is attached, the angle of view will automatically be adjusted to 23.5 × 15.7 mm (DX format).

If a 35 mm format lens is attached, the angle of view can be reduced by 1.5 × by turning Auto DX crop off and selecting DX (24×16).

FX (36×24) picture size (35.9 × 24.0 mm, equivalent to 35mm format camera)

Lens

Picture diagonal

 

DX (24×16) picture size (23.5 × 15.7 mm, equivalent to DX format camera)

Angle of view (FX (36×24); 35mm format)

Angle of view (DX (24×16); DX format)

The DX (24×16) angle of view is about 1.5 times smaller than the 35mm format angle of view. 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 (for example, the effective focal length of a 50mm lens in 35mm format would be 75 mm when DX (24×16) is selected).

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