Nikon D40 - Manual (Page 90)

78 Menu Guide/Custom Settings
14: Built-in Flash (P, S, A, and M Modes Only)
Choose a flash control mode for the built-in flash or the optional
SB-400 Speedlight.
TTL (default): Flash output is adjusted automatically in response to
shooting conditions.
Manual : The flash fires at the level selected in the menu shown at
right. At full power, the built-in flash has a Guide Number of 18/59
(ISO 200, m/ft., 20°C
/68 °F).
A icon flashes in the viewfinder and shooting information dis-
play when Manual is selected.
The Optional SB-400 Speedlight
When an optional SB-400 Speedlight is attached, Custom Setting 14 is
used to choose the flash control mode for the SB-400 and the name
changes to Optional Speedlight.
15: Auto off Timers
Choose how long the monitor and exposure meters ( 14)
remain on when no operations are performed. Choose a shorter
auto off delay for longer battery life.
Note that the shooting information display turns off automatically when the exposure
meters turn off.
Using an AC Adapter
Regardless of the setting chosen, the monitor and exposure meters do not turn off automatically
when the camera is powered by an optional EH-5 AC adapter and EP-5 AC adapter connector ( 103).
Option Description
Short
Monitor and exposure meters remain on for 4s. When Image review is on, pictures are
displayed in monitor for 4s after shooting ( 75).
Normal
(default)
Monitor and exposure meters remain on for 8s. When Image review is on, pictures are
displayed in monitor for 4s after shooting ( 75).
Long
Monitor remains on for 20s; exposure meters remain on for 1minute. When Image
review is on, pictures are displayed in monitor for 20s after shooting ( 75).
Custom
Choose monitor off delay and image review time from 4s, 8s, 20s, 1minute, and
10minutes. Choose auto meter-off delay from 4s, 8s, 20s, 1minute, or 30minutes.