Filter
Top Products
246
Technical Notes—Optional Accessories
CPU lenses can be iden ti fi ed by the presence of CPU contacts. Type G lenses
are marked with a “G” on the lens barrel, type D lenses with a “D.”
Type G lenses are not equipped with a lens aperture ring. Unlike other CPU
lenses, there is no need to lock the aperture ring at the minimum aperture
setting (maximum f/-number) when using a type G lens.
Picture Angle and Focal Length
The diagonal picture angle of the D2Xs is less than that of a 35-mm cam-
era. When cal cu lat ing the focal length of the lenses for the D2Xs in 35-mm
format, mul ti ply the focal length of the lens by about 1.5 (high-speed crop
mode off) or 2 (high-speed crop mode on):
CPU lens Type G lens Type D lens
Cal cu lat ing Picture Angle
The size of the area exposed by a 35-mm cam-
era is 36 × 24 mm. The size of the area exposed
by the D2Xs, in contrast, is 23.7 × 15.7 mm
(high-speed crop off) or 17.7 × 11.7 mm (high-
speed crop on). As a result, the picture angle
of photographs taken with the D2Xs 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 size
(D2Xs; high-speed crop off)
Picture size (35-mm format)
Lens
(23.7 mm × 15.7 mm)
Picture size
(D2Xs; high-speed crop on)
(17.7 mm × 11.7 mm)
Picture diagonal
(36 mm × 24 mm)
Picture angle (35-mm format)
Picture angle
(D2Xs; high-speed crop off)
Picture angle
(D2Xs; high-speed crop on)
Picture angle
Approximate focal length (mm) in 35-mm format
(modifi ed for picture angle)
35-mm fi lm camera 20 24
30 36
135
202.5 270 300 450 600 750
170 360 400 600 800 1000 1200210
900157.5
180 200 300 400 500 600105
42 52.5 75 90
40 48 56 70 100 120 17034
127.525.5
28 35 50 60 8517
Hi-speed crop: Off
35-mm fi lm camera
Hi-speed crop: On
D2Xs
Hi-speed crop: On
Hi-speed crop: Off
D2Xs