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How Does A Camera Aperture Work?

Aperture refers to the opening of a lens's diaphragm through which light passes.

The diaphragm is made up of blades that overlap and open or close.

  • To understand how aperture works on a camera it helps to compare it to the pupil of the human eye. The less light there is, the wider you open your pupil, while if there is a lot of light it narrows down to a small opening and blocks the amount of incoming light.

    The Aperture Scale of a lens is divided into what we call f stops. By opening the aperture by 1 stop we are doubling the amount of light it lets through. By closing the aperture by one stop we are halving the amount of light.

    Most cameras will allow us to adjust the aperture in smaller increments than one f/stop, usually in 3rd stop increments.

 If you want to learn more about how apertures work and how it can effect your images, take a look at our Get to Know your DSLR/CSC Course which you can find > Here

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