Shutter Speed

Shutter speed is very easy to understand. It is simply the amount of time the shutter is left open, controlling how in focus the photo is. How will one know what shutter speed to set their camera at? It all depends on how in focus you want your picture to be. For example, if you wanted to take a picture of a bird flying through the sky, and it was flying relatively fast, you would want to make your shutter speed faster. Vice versa, if you wanted to take a picture of a chair, you wouldn't need to set your shutter speed as fast.