The Olympus OM-4 is a 35mm SLR film camera that was introduced by Olympus in 1983. It is part of the highly regarded OM series of cameras, known for their compact size and excellent build quality. The OM-4 features a full manual exposure control, as well as aperture-priority and program modes. It has a built-in light meter that uses a unique multi-spot system, which allows for precise metering even in challenging lighting conditions. The camera has a rugged metal body with a comfortable grip, making it easy to handle and carry. It also has a bright and clear viewfinder, with a split-image focusing screen and a microprism collar for accurate focusing. The OM-4 is compatible with a wide range of Olympus OM lenses, making it a versatile choice for photographers. Overall, the Olympus OM-4 is a reliable and high-performing camera that is well-suited for both beginners and advanced photographers.