The opening inside a lens that allows the photographer to reduce or increase the amount of light let through to the sensor or film of the camera.  The smaller the aperture (f-stop) the larger the opening and the more light let in.

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Is an amateur photographer and writer who enjoys sharing information with others. "Technical information sharing is a critical part of helping everyone become a better photographer. If you don't know it, you can't do it!" From Film to Digital, photography has changed a lot, but the idea of learning hasn't.

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