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CUSTOM SETTINGS AND OTHER MENUS—CUSTOM SETTINGS
Custom Setting 19: Aperture Control during Zoom
On lenses with a variable focal length (for example, Micro
Nikkor or zoom lenses), maximum aperture varies with focal
length. This setting determines how such changes in the maxi-
mum aperture affect the f/-number specified by the user in
aperture-priority auto or manual exposure modes. By de-
fault, aperture remains fixed at the specified f/-number while
the lens is zoomed in or out. If desired, the camera can instead be set to vary the f/
-number with focal length so that aperture remains a fixed number of steps from the
maximum setting. Suppose, for example, that a 70–210 mm, f/4–5.6 AF Zoom-
Nikkor lens is mounted on the camera, and an aperture of f/8 is selected when the
lens is zoomed out to 70 mm. At this zoom position, f/8 is two steps from the
maximum aperture of f/4. Now imagine that the lens is zoomed in to 210 mm. If
fixed aperture is selected, aperture will remain constant at f/8. If aperture is set to
vary with focal length, however, aperture will decrease to f/11, two steps from f/5.6,
the maximum value for this focal length.
OK
F19
Aperture Control
during Zoom
Fixed
Variable
CSM MENU
DescriptionNo.Option
Aperture does not vary with lens focal length.
Fixed
(default)
Variable
For more information on:
pg. 84 Exposure mode
Aperture varies with lens focal length.