Nikon D1X User Manual page 214

Lens Focal Length and Picture Angle
The size of the area exposed with a 35-mm camera is 24
the D1 , however, it is 15.6
X
graphs taken with the D1
even when the focal length of the lens and the distance to the subject are the same.
The diagonal picture angle of a 35-mm camera is roughly 1.5 times that of the D1
Consequentl y when a lens of a given focal length is attached to the D1
sponding focal length in 35mm format at the D1
by multiplying the focal length of the lens by 1.5. The following chart shows some
examples:
Picture angle
35-mm film camera
D1
X
Picture angle
35-mm film camera
D1
X
Using a Non-CPU Lens
When using a non-CPU lens, choose center-weighted or spot metering and set the exposure
mode to aperture-priority auto or manual. Even if you choose programmed auto or shutter-
priority auto, the camer a will automatically select aperture-priority auto with center-weighted
metering, and the exposure mode indicator (P or S) in the control panel on top of the camera
will blink to show that aperture-priority auto is in effect (the viewfinder display will show A).
Regardless of the exposure mode selected, aperture can only be set using the lens aper ture
ring; the sub-command dial can not be used to set aper ture. The aper ture indicators in the
viewfinder and in the control panel on top of the camera will show
23.7 mm. Consequently, the picture angle of photo-
will differ from the picture angle for 35-mm cameras,
X
Lens
Picture angle (35-mm format)
Approximate Focal length (mm) in 35-mm format
(modified for picture angle)
17 20 24
25.5 30 36
Approximate Focal length (mm) in 35-mm format
(modified for picture angle)
105 135 180
157.5 202.5 270
36 mm. In the case of
Picture size (35-mm format)
(24 mm 36 mm)
Picture diagonal
Picture size (D1x)
(15.6 mm 23.7 mm)
Picture angle (D1x)
's picture angle can be calculated
X
28 35 50
42 52.5 75
200 300 400
300 450 600
--.
F
.
X
, the corre-
X
60 85
90 127.5
500 600
750 900
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