Nikon D100 Product Manual - Page 95

Controlling How the Camera Sets Exposure Taking Photographs-Exposure Long Time-Exposures At a shutter speed of , the shutter will remain open while the shutter-release button is held down. Note that if the shutter is open for more than approximately 1/2 s 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 under- 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 1/3 EV or 1/2 EV. If the limits of the exposure metering system are exceeded, the electronic analog exposure display will flash. Custom Setting 9 set to "1/3 Step" Optimal exposure Custom Setting 9 set to "1/2 Step" Optimal exposure Underexposed by 1/3 EV Overexposed by more than 2 EV Underexposed by 1/2 EV Overexposed by more than 3 EV The electronic analog exposure display is not shown when shutter speed is set to . 4-Long Exp. NR ( 149) To reduce noise at shutter speeds of about 1/2 s or slower, select ON for Custom Setting 5. Note that this increases the time needed to save photographs to the memory card. 9-EV Step ( 151) This option controls whether changes to shutter speed and aperture are made in increments equivalent to 1/3 EV (the default setting) or 1/2 EV. 13-Command Dial ( 154) This option can be used to reverse the roles of the command dials so that the subcommand dial controls shutter speed, while the main command dial controls aperture. 83