YouTube Notes

Whenever you see a clear picture, that means that the camera is capturing the perfect amount of light so that it can capture the scene or image properly. The exposure is determined by the aperture, the shutter speed, and the ISO. The aperture is the size of the opening of the lens. When you look into your lens, you can see the aperture blades that open and close, depending on where your aperture value is. The bigger the aperture is, the more light comes in, and the smaller the aperture is, the less light comes in. An f/1.8 or f/2 aperture means that you will be getting more light. A number like f/16 or f/22, means that you will be getting less light. The aperture affects the depth of field, which is how much your image is focused. Having a shallow depth of field means that your subject is in focus, but the foreground and background are not in focus. If you have a wide or large depth of field, that means that a lot of your image is focused. If you want a shallow depth of field, you will need a bigger aperture. Another thing that will affect your exposure is your shutter speed, which is how fast you shutter opens and closes. The faster your shutter speed is, the shorter your exposure takes place, which means there will be less light going into your image. The slower your shutter speed, is the longer your exposure is., which means you get more light in your image. When your shutter speed is fast, it gives less time for the subjects in your picture to move, therefore leaving almost nothing to be blurred. If your exposure takes place for a long time, more light is coming to your image. But, since the speed is slow, it gives more time for objects in your picture to move, making many things blurry. The third thing that affects the exposure is the ISO, which is the sensitivity found in the camera's sensor. The lower the ISO is, the lower the light sensitivity is, which means you will need more light to expose your image. the higher the ISO is, the more sensitive your camera's sensor is, which means you will need less light to expose your image. But the tricky part of ISO is the higher you turn it up, the more grainy your picture will come out. Having your photo look grainy means that the colours will look really saturated or really unsaturated, which will make the colours look unrealistic, and makes the photo look bad. Once you learn how to balance your exposure, taking pictures will become easier, and you will be left with excellent looking pictures.