Put simply, the ‘aperture’ is the hole in the lens that lets the light through, and for a long time camera lenses have had adjustable apertures so that you can control the amount of light. It’s one of the settings you use to control exposure, alongside shutter speed and the ISO setting.It’s all done with internal diaphragms within the lens made up of overlapping aperture ‘blades’. These swing in and out as you adjust the aperture to create a
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