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APicture Angle and Focal Length
The D3S can be used with Nikon lenses for 35mm (135) format cameras.
If Auto DX crop is on 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 from FX (36×24), 1.2× (30 ×20),
DX(24× 16), and 5 : 4 (30× 24).
If a 35mm format lens is attached, the
picture angle could be reduced by 1.5× by selecting DX (24×16) or by
1.2× by selecting 1.2× (30 ×20), to expose a smaller area, or the aspect
ratio could be changed by selecting 5: 4 (30 ×24).
Lens
FX(36× 24) picture size (36.0 × 23.9 mm,
equivalent to 35mm format camera)
Picture diagonal
DX(24× 16) picture size
(23.5× 15.6 mm, equivalent to DX
format camera)
5: 4 (30× 24) picture size
(30.0× 23.9 mm)
Picture angle (FX(36× 24);
35mm format)
Picture angle (DX(24 ×1 6); DX format)
Picture angle (5:4 (30×24))
1.2×(30× 20) picture size
(30.0 × 20.0 mm)
Picture angle (1.2× (30×20))