135 film, also known as 35mm film, is a popular format used in photography and cinematography. It consists of a strip of plastic coated with light-sensitive emulsion, allowing images to be captured when exposed to light. The standard width of the film is 35 millimeters, and it typically comes in rolls that can be developed into photographs or used in cameras. This film format was first introduced in the late 19th century and became widely adopted in the 20th century. 135 film is available in various types, including color and black-and-white options, and is compatible with many cameras and projectors. Its versatility and quality have made it a favorite among both amateur and professional photographers.