"Without a doubt, digital illustration and art is a big part of any Photoshop oriented community. A great way to get started on that road is to create as much as possible using Photoshop's unique tools. Let's make good use of them and learn one way of featuring a digital camera with glowing beams of light." - Alex Beltechi
Here is a link to the written version of the tutorial How to Digitally Illustrate a Camera with Light Streaks and the video version is below.