Nikon D300 User Manual (en)

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A
Electronic Analog Exposure Displays
The electronic analog exposure displays in the control panel and 
viewfinder show whether the photograph would be under- or over-
exposed at current settings. Depending on the option chosen for Custom 
Setting b2 ([EV steps for exposure cntrl.], pg. 275), the amount of under- or 
over-exposure is shown in increments of 
1
/
3
EV, 
1
/
2
EV, or 1 EV. If the limits 
of the exposure metering system are exceeded, the displays will flash.
A
Long Time-Exposures
At a shutter speed of 
A, the shutter will 
remain open while the shutter-release button 
is held down. Use for long time-exposure 
photographs of moving lights, the stars, night 
scenery, or fireworks. Nikon recommends 
using a fully-charged EN-EL3e battery or an 
optional EH-5a or EH-5 AC adapter to prevent 
loss of power while the shutter is open. Note 
that noise and color distortion may be present 
in long exposures; before shooting, choose [On] for the [Long exp. NR] 
option in the shooting menu (pg. 262).
A
See Also
See Custom Setting f10 ([Reverse indicators], pg. 310) for information on 
reversing the electronic analog exposure display.
Custom Setting b2 set to [1/3 step]
Optimal exposure
Underexposed by 
1
/
3
EV Overexposed by over 2 EV
Control panel
Viewfinder
Shutter speed: 35 s
Aperture: f/25