Nikon F100 Instruction Manual page 74

Menu/Features of Custom Setting
15.Delay time for auto meter-switch off (page 17)
4 : 4 sec.
Options
6 : 6 sec. (initial setting)
8 : 8 sec.
16 : 16 sec.
At default setting, the exposure meter automatically turns off 6 sec. after
turning the power switch on or lightly pressing the shutter release button.
However, it can be changed to 4 sec., 8 sec. or 16 sec. (Note that the usable
number of film rolls per batteries decreases with the longer delay time for
auto meter-switch-off since it consumes more power.)
16.Delay time for self-timer operation (page 67)
Options 2 : 2 sec.
5 : 5 sec.
10 : 10 sec. (initial setting)
20 : 20 sec.
At default setting, the shutter is released 10 sec. after the shutter release
button is fully depressed in self-timer operation. However, this can be
changed to 2, 5, or 20 sec.
17.LCD illuminator activated by pressing any button (page 63)
Options 0: Disabled (initial setting)
1: Enabled
At default setting, turning the power switch to Πactivates the LCD
illuminator. However, it can be set to be activated with a press of any button.
18.Data imprint (year/month/day/hour/minute) on frame #0 (page 92)
Options 0: Disabled (initial setting)
1: Enabled
With optional Data Back MF-29, data (year/month/day/hour/minute) can be
set to be imprinted on frame #0. To imprint data on frame #0 only and not on
frame #1 on, cancel the data imprint on the MF-29 after film is automatically
advanced to the first frame.
19.Aperture control (pages 50-53)
Options 0: Aperture value remains (initial setting)
1: Aperture step from the lens' maximum remains unchanged
When a Micro Nikkor lens is extended or the focal length is changed with a
zoom lens in which maximum aperture varies with focal length, the aperture
value set with the Sub-Command Dial remains. However, it can be changed
to keep the aperture steps from the lens' maximum aperture (in Aperture-
Priority Auto or Manual exposure mode).
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