+**Aperture** is the adjustable opening within a [Lens](/wiki/lens) that controls the amount of light reaching the [Sensor](/wiki/sensor) or film. It profoundly influences the [Depth of Field](/wiki/depth-of-field), determining how much of an image appears sharply focused. Measured in f-numbers, adjusting this opening is a fundamental control for achieving desired photographic effects.
+## See also
+- [Shutter Speed](/wiki/shutter-speed)
+- [ISO](/wiki/iso)
+- [Exposure Triangle](/wiki/exposure-triangle)
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