175lFlash ModesThe D300S supports the following flash modes:Flash mode DescriptionFront-curtainsyncThis mode is recommended for most situations. Inprogrammed auto and aperture-priority auto modes,shutter speed will automatically be set to valuesbetween 1 /250 and 1 /60 s (1/ 8,000 to 1 /60 s when an optionalflash unit is used with Auto FP High-Speed Sync; 0 281).Red-eyereductionRed-eye reduction lamp lights for approximately onesecond before main flash. Pupils in subject’s eyescontract, reducing “red-eye” effect sometimes caused byflash. Owing to one-second shutter-release delay, thismode is not recommended with moving subjects or inother situations in which quick shutter response isrequired. Avoid moving camera while red-eye reductionlamp is lit.Red-eyereduction withslow syncCombines red-eye reduction with slow sync. Use forportraits taken against a backdrop of night scenery.Available only in programmed auto and aperture-priority auto exposure modes. Use of a tripod isrecommended to prevent blurring caused by camerashake.Slow syncFlash is combined with shutter speeds as slow as 30 s tocapture both subject and background at night or underdim light. This mode is only available in programmedauto and aperture-priority auto exposure modes. Use oftripod is recommended to prevent blurring caused bycamera shake.Rear-curtainsyncIn shutter-priority auto or manual exposuremode, flash fires just before the shuttercloses. Use to create effect of a stream oflight behind moving objects. In programmedauto and aperture-priority auto, slow rear-curtain sync isused to capture both subject and background. Use oftripod is recommended to prevent blurring caused bycamera shake.
