Nikon D7500 Users Manual - English for customers in Asia Oceania the Middle Ea - Page 330

Noise (bright spots, randomly-spaced bright pixels, fog, or lines) appear in photos: • Bright spots, randomly-spaced bright pixels, fog, and lines can be reduced by lowering ISO sensitivity. • Use the Long exposure NR option in the photo shooting menu to limit the occurrence of bright spots or fog in photos taken at shutter speeds slower than 1 s (0 255). • Fog and bright spots may indicate that the camera's internal temperature has become elevated due to high ambient temperatures, long exposures, or similar causes: turn the camera off and wait for it to cool before resuming shooting. • At high ISO sensitivities, lines may appear in photos taken with some optional flash units; if this occurs, choose a lower value. • At high ISO sensitivities, including high values selected with auto ISO sensitivity control, randomly-spaced bright pixels can be reduced by selecting High, Normal, or Low for High ISO NR in the photo or movie shooting menu (0 255, 259). • At high ISO sensitivities, bright spots, randomly-spaced bright pixels, fog, or lines may be more noticeable in long exposures, multiple exposures, and photos taken at high ambient temperatures or with Active D-Lighting enabled, Flat selected for Set Picture Control (0 148) or extreme values selected for Picture Control parameters (0 151). • In % mode, randomly-spaced bright pixels, fog, or lines may be more noticeable in pictures shot under low light. Flicker or banding appears in movie mode: Select Flicker reduction in the movie shooting menu and choose an option that matches the frequency of the local AC power supply (0 259). Bright regions or bands appear in live view: A flashing sign, flash, or other light source with brief duration was used during live view. Sound is not recorded with movies: Microphone off is selected for Microphone sensitivity in the movie shooting menu (0 259). 304