Analog cameras are devices that capture images using a chemical process rather than a digital one. These cameras, which were mostly in use until the 1990s, rely on photographic film that records light through a chemical reaction. When a photo is taken, the shutter opens, allowing light to hit the film, which is coated with a light-sensitive emulsion. Once exposed, the film must be developed in a process that requires several chemical steps to transform invisible images into visible photographs.