The exposure triangle in simple terms shows the exposure of the photo using the three points: aperture, shutter speed, and ISO. Aperture is the size of the hole that lets in light. The shutter speed or exposure time is the length of time the light is being let into the camera. With faster shutter speed, the motion is being frozen but with slower shutter speed, the motion is one long movement. For example, for a waterfall, the water will look like silk. Lastly ISO, this is the camera's sensitivity to light. When balancing these three components the image will have the desired look depending on the photographer's preference. The exposure triangle is the beginning of creating an impactful image.
By understanding the relationship of the exposure triangle we can estimate "the perfect" measurements for each photo. For example, shooting a water landscape image the photographer will need to have a tripod for starters. Then we will look at the brightness of the scene if it is midday we can use the ISO 100 since it is the lowest and do not want a washed-out white image. Next, we will look at how long we will have the light coming into the camera, shutter speed. For this, since the photographer is shooting the water they will use longer shutter speed for silky looking water. And for aperture, the smaller the hole the more focused the whole image will be the bigger the hole the camera will focus on the foreground and blur the background. Ideally using the smallest aperture will have a better outcome for a water landscape.
In conclusion, the exposure triangle parts consist of aperture, shutter speed, and ISO. In other words is the size of the hole, length the camera is being exposed to light and the sensitivity of light to the camera. Keeping them in mind while taking photos can lead to a quality image.
