Exposure Lock (AE-L Button) is the abbreviation stands for Automatic Exposure Lock. It is useful using automatic and semi-automatic shooting modes. Where has this information been all my photographing life?
Nikon Beginner DSLR: Guided Tour from Adorama Learning Center for Tracey
Heres a great Canon vs Nikon shooting modes cheat sheet to help understand Camera settings
Nikon Beginner DSLR: Guided Tour from Adorama Learning Center
Exposure Tutorial: What is ISO? - what ISO to use, photography basics, beginner photographer, Moms with a Camera