F stop. manual settings no meter. Huh I will see about this. I'm a believer in histograms
Exposure Lock (AE-L Button) is the abbreviation stands for Automatic Exposure Lock. It is useful using automatic and semi-automatic shooting modes.
Download your free cheat sheet to help you get off AUTO and start getting more creative photos with your Digital Camera. IT shows you how you can control Depth of Field. It shows the best Aperture for Portraits and the best Aperture for Landscape photos. It also looks at another key factor in controlling Depth of Field: Focusing Distance.:
Using Your Nikon DSLR by Carrie WishWishWish, via Flickr