In the YouTube video, posted by CamCrunch tells and exemplifies the basic tools in photography that are a necessity.
He first introduces aperture, which is the wideness and width of the lens. The wideness and width of the lens tells and allows how much light is allowed to/will be brought into a shot. A wide aperture accepts more light, making the shot brighter. All while a small aperture lets hardly any light in, making the shot darker. Not only does aperture add light or subtract light from a picture, but it also shows and tells the depth of a photo. A lower f, the subject in front will be focused while the background will be blurry and unfocused.
Aperture is not the only thing that affects exposure. So does shutter speed. Shutter speed is how fast the lens opens and closes or how long the photo is exposed. A shorter exposure space is caused by fast shutter speed. Meaning, you get less light into the photo whereas with a longer shutter speed, more light is brought into the photo and the bigger chance for a blurry shot.
ISO also deals with exposure. ISO is the sensitivity of an image. A low ISO means you will need more light to expose an image. Whereas a high ISO means you will need to lower and lessen the light to expose the image you are trying to capture. Higher ISO also causes more grain to show up, which is not wanted because it may give an image too much color or not enough (noise). A low ISO creates no noise.
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