Shutter speed, another main factor of the mysterious exposure triangle, however the good news is that it is usually the easiest of the big 3 for beginners to master (it was for me anyway). Shutter speed can allow you to get a razor sharp shot freezing the action or the nice motion blurred image implying movement and motion. Whichever type of shot you are shooting, it is important to know how shutter speed works and how it's going to affect your overall exposure.