Nikon D700 manual 376, Calculating Picture Angle, Is selected

ACalculating Picture Angle

The D700 can be used with Nikon lenses for 35mm (135) format cameras. If Auto DX crop is on (the default setting) and a 35mm format lens is attached, the picture angle will be the same as a frame of 35mm film (36.0 × 23.9 mm); if a DX lens is attached, the picture angle will automatically be adjusted to 23.5 × 15.6 mm (DX format).

To choose a picture angle different from that of the current lens, turn Auto DX crop off and select FX format (36 × 24) or DX format (24 × 16). If a

35 mm format lens is attached, the picture angle could be reduced by 1.5 × by selecting DX format (24 × 16), exposing a smaller area.

FX format (36 × 24) picture size (36.0 × 23.9 mm, equivalent to 35mm format camera)

Picture diagonal

Lens

DX format (24 × 16) picture size (23.5 × 15.6 mm, equivalent to DX format camera)

Picture angle (FX format (36 × 24); 35mm format)

Picture angle (DX format (24 × 16); DX format)

The DX format (24 × 16) picture angle is about 1.5 times smaller than the

35mm format picture angle. To calculate the focal length of lenses in 35mm format when DX format (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 format (24 × 16)

n is selected).

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