Shooting in manual exposure mode allows you to control the three most important settings in your camera: Shutter Speed, Aperture, and ISO sensitivity. By mastering this mode, you will be able to experiment with new and abstract photography styles. Learning to shoot in manual exposure mode is a great way to better understand the principles of photography.
Shutter speed controls the length of time that the image sensor is exposed to light entering the camera. Set a fast shutter speed, such as 1/1000 seconds, to freeze a moving subject, or use a slow shutter speed, such as 1/30 seconds, to capture the movements of moving subjects.
Aperture is the opening in the lens that determines how much light enters through the lens. Using a low aperture value such as f/2.8 will give you a shallow depth of field. This is great if you want to isolate your subject against a beautifully blurred background, also known as bokeh. A higher aperture value such as f/8 will give you a wider depth of field, resulting in an image where more areas of the scene appear to be in focus.
ISO sensitivity is the measure of the camera's ability to capture light. In bright or well-lit situations, ISO 100 would be a suitable setting to be used. While in low light situations, using a higher ISO sensitivity setting, such as ISO 3200, allows you to capture amazing night scenes and landscapes.
Strike the right balance between the three settings and you will be on your way to mastering manual exposure mode. Get creative with manual control over your shutter speed, aperture and ISO sensitivity.