The Leica M4-P is a fully manual, battery-free 35mm film rangefinder camera produced from 1980 to 1986, known for its compact, all-metal construction and bright viewfinder, making it popular for street photography. It features multiple frameline pairs for different lenses, a hotshoe, and a modern quick-load film system but lacks a built-in light meter, requiring an external one for accurate exposures.