How a still camera works in short?

A still camera captures images by allowing light to enter through a lens, which focuses the light onto a photosensitive surface, such as film or a digital sensor. When the shutter button is pressed, the shutter opens for a brief moment, permitting light to expose the photosensitive surface and create an image. The camera then processes this exposure, either developing the film chemically or converting the light into digital data for storage. This entire process results in a still photograph.