Photography cheat sheet: aperture controls on your camera and lenses

Glading Marteen 

The aperture of your lens is one of the three fundamentals of exposure in photography, and one element of the exposure triangle (opens in new tab). Changing the aperture allows you to alter both the exposure of a picture and how much of it appears sharply focused.

The aperture itself requires little explanation: it’s a physical hole in the lens that light passes through to reach your camera’s imaging sensor. In most lenses, this hole is formed by overlapping blades that create a diaphragm, which regulates how much light is let into the camera.

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