The Exposure Triangle!
The exposure triangle is where a photograph's exposure determines how light or dark an image will appear when it's been captured by your camera. All that is down to you how you and how you as you use just three camera settings: aperture, ISO and shutter speed (the "exposure triangle"). Mastering their use is an essential part of developing an intuition for photography.
What does the exposure triangle do?
As you can see in the bottom left hand corner you will see Aperture, basically, large aperture lets in more light to the camera shutter for an exposure, while small aperture has a smaller opening in the lens diaphragm to let in less light for a given exposure. Also if you look in the bottom right hand corner you will see Shutter Speed. Shutter speed is; the faster the Shutter Speed, the shorter the time the image sensor is exposed to light. However the slower the Shutter Speed, the longer the time the image sensor is exposed to light. If you are photographing a subject that's in motion, you will get different effects at different Shutter Speeds! And not to forget, at the top of the triangle there is ISO which in very basic terms, ISO is the level of sensitivity of your camera to available light. The lower the ISO number, the less sensitive it is to the light. As well as this when the ISO number is higher the sensitivity of your camera! |