by John M. Setzler, Jr.
(This tip was submitted by a user.)
This is John's tutorial on exposure technique and basically how the camera works.
John discusses such topics as light, shutter speed, and aperture, and how you can use them to achieve the
effects you want in your images.
He also provides questions that let you test your knowledge (and yes, the answers are at the end of the tutorial
Here's the tutorial, in a PDF file (about 1.5MB).