Nikon D3X User Manual page 221

Flash mode Description
Combines red-eye reduction with slow sync. Use for
portraits taken against a backdrop of night scenery.
Available only with SB-900, SB-800, SB-600, and SB-400
Red-eye
in exposure modes e and g. Tripod is recommended to
reduction with
prevent blurring caused by camera shake.
slow sync
l
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