Nikon D1H User Manual page 185

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.
Option
Fixed
(default)
Variable
For more information on:
pg. 84 Exposure mode
No.
Aperture does not vary with lens focal length.
Aperture varies with lens focal length.
CSM MENU
F19 Aperture Control
during Zoom
Fixed
Variable
Description
OK
171