Nikon D70S Benutzerhandbuch
185
Technical Notes—Optional Accessories
Picture angle
Approximate focal length (mm) in 35-mm format
(modifi ed for picture angle)
35-mm fi lm camera
20
24
28
35
50
60
85
17
D70S
30
36
42
52.5
75
90
127.5
25.5
35-mm fi lm camera
135
180
200
300
400
500
600
105
D70S
202.5
270
300
450
600
750
900
157.5
Cal cu lat ing Picture Angle
The size of the area exposed by a 35-mm
camera is 36 × 24 mm. The size of the
area exposed by the D70S, in contrast,
is 23.7 ×15.6 mm. As a result, the picture
angle of photographs taken with the
D70S differs from the picture angle for
35-mm cameras, even when the focal
length of the lens and the distance to the
subject are the same.
camera is 36 × 24 mm. The size of the
area exposed by the D70S, in contrast,
is 23.7 ×15.6 mm. As a result, the picture
angle of photographs taken with the
D70S differs from the picture angle for
35-mm cameras, even when the focal
length of the lens and the distance to the
subject are the same.
Picture Angle and Focal Length
A 35-mm cam era has a di ag o nal pic ture angle ap prox i mate ly one-and-a-half
times that of the D70S. When cal cu lat ing the focal length of lenses for the
D70S in 35-mm format, you will therefore need to mul ti ply the focal length
of the lens by 1.5, as shown in the following table:
times that of the D70S. When cal cu lat ing the focal length of lenses for the
D70S in 35-mm format, you will therefore need to mul ti ply the focal length
of the lens by 1.5, as shown in the following table:
Picture size (D70S)
Picture size (35-mm format)
Lens
(23.7 mm
× 15.6 mm)
Picture diagonal
(36 mm
× 24 mm)
Picture angle (35-mm format)
Picture angle (D70S)