Definition: term used to describe the adjustable aperture of a lens. It controls the amount of light passing into the camera and may be in front of, within or behind the lens.
Definition: The part of the camera that governs the size of the aperture. The most common type is the iris diaphragm- a system of curved, overlapping metal blades that form a roughly circular opening similar to the iris of the eye. It varies in size to control the amount of light.
Definition: Lens opening. A perforated plate or adjustable opening mounted behind or between the elements of a lens used to control the amount of light that reaches the film. Openings are usually calibrated in f-numbers.
Definition: The part of the camera that governs the size of the aperture. The most common type is the iris diaphragm- a system of curved, overlapping metal blades that form a roughly circular opening similar to the iris of the eye. It varies in size to control the amount of light.
Definition: Lens opening. A perforated plate or adjustable opening mounted behind or between the elements of a lens used to control the amount of light that reaches the film. Openings are usually calibrated in f-numbers.
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