Nikon D50 D50 User's Manual - Page 115

Lenses, Type D lenses

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Lenses CPU lenses (particularly type G and D lenses) are recommended for use with the D50 (note that IX Nikkor CPU lenses can not be used). CPU lenses can be identified by the presence of CPU contacts. Type G lenses have no aperture ring and are marked with a "G" on the lens barrel. Type D lenses are indicated by a "D." CPU lens Type G lens Type D lens Technical Notes-Optional Accessories Calculating Picture Angle The size of the area exposed by a 35mm camera is 36 × 24 mm. The size of the area exposed by the D50, in con- Lens trast, is 23.7 ×15.6 mm, meaning that the diagonal picture angle of a 35-mm camera is approximately 1.5 times that of the D50. Picture size (35-mm format) (36 mm × 24 mm) Picture diagonal Picture size (D50) (23.7 mm × 15.6 mm) Picture angle (35-mm format) Picture angle (D50) 105

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105
Technical Notes—Optional Accessories
Lenses
CPU lenses (particularly type G and D lenses) are recommended for use
with the D50 (note that IX Nikkor CPU lenses can not be used).
CPU lenses
can be identified by the presence of CPU contacts.
Type G lenses have no
aperture ring and are marked with a “G” on the lens barrel.
Type D lenses
are indicated by a “D.”
CPU lens
Type G lens
Type D lens
Calculating 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 D50, in con-
trast, is
23.7 ×15.6 mm, meaning that
the diagonal picture angle of a 35-mm
camera is approximately 1.5 times that
of the D50.
Picture size (D50)
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 (D50)