Nikon D100 Manual page 95

Long Time-Exposures
At a shutter speed of
button is held down. Note that if the shutter is open for more than approximately
at any setting, "noise" in the form of randomly-spaced, brightly-colored pixels may
appear in the final photograph.
Electronic Analog Exposure Display
The electronic analog exposure display shows whether the photograph would be un-
der- or over-exposed at current settings. Depending on the option chosen for Custom
Setting 9 (EV Step), the amount of under- or over-exposure is shown in increments of
1 / EV or 1 / EV. If the limits of the exposure metering system are exceeded, the elec-
3 2
tronic analog exposure display will flash.
Custom Setting 9 set to "1/3 Step"
Optimal exposure
Underexposed by
Overexposed by more than 2 EV
The electronic analog exposure display is not shown when shutter speed is set to
4—Long Exp. NR (
To reduce noise at shutter speeds of about
5. Note that this increases the time needed to save photographs to the memory card.
9—EV Step (
This option controls whether changes to shutter speed and aperture are made in incre-
ments equivalent to
13—Command Dial (
This option can be used to reverse the roles of the command dials so that the sub-
command dial controls shutter speed, while the main command dial controls aperture.
Controlling How the Camera Sets Exposure
, the shutter will remain open while the shutter-release
1
/ EV
3
149)
151)
1
/ EV (the default setting) or
3
154)
Custom Setting 9 set to "1/2 Step"
Optimal exposure
Underexposed by
Overexposed by more than 3 EV
1
/ s or slower, select ON for Custom Setting
2
1
/ EV.
2
1
/ s
2
1
/ EV
2
.
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