Nikon D100 Product Manual - Page 108

Taking Photographs-Flash Photography Flash Sync Modes The D100 supports the following flash sync modes: Flash sync mode Flash control This mode is recommended for most situations. In auto multi program and aperture-priority auto modes, shutter speed will Front-curtain sync automatically be set to values between 1/60 s and 1/180 s. AF-assist illuminator lights for approximately one second before main flash fires, causing pupils in subject's eyes to contract and reducing the "red-eye" effect a flash can sometimes cause. Best when subject is well within range of flash and fully facing cam- era. Because shutter is not released until about one second Red-eye reduction after shutter-release button is pressed all the way down, this mode is not recommended for subjects that are moving errati- cally or on other occasions when you want the camera to re- spond quickly to shutter-release button. After pressing shutter- release button, do not move camera until photo has been taken. Combines red-eye reduction with slow sync. This mode is only available in auto multi program and aperture-priority auto expoRed-eye reduction sure modes. Use of a tripod is recommended to prevent blurwith slow sync ring caused by camera shake. Slow sync Flash is combined with speeds as slow as 30 s to capture both subject and background at night or under dim light. This mode is only available in auto multi program and aperture-priority auto exposure modes. Use of a tripod is recommended to prevent blurring caused by camera shake. In shutter-priority auto or manual exposure mode, the flash fires just before the shutter closes, creating the effect of a stream of Rear-curtain sync light behind moving objects. In auto multi program and aperture-priority auto, slow rear-curtain sync is used to capture both subject and background. Use of a tripod is recommended to Slow rear-curtain sync prevent blurring caused by camera shake. 96