Pentax's simplest K-mount SLR with program auto and built-in winder, the absolute cheapest K-mount body.
The Pentax P3 is an entry-level 35mm SLR from 1985 offering program auto exposure in the Pentax K-mount system. The P3 was Pentax's most basic SLR, providing a gateway to K-mount photography with simple program automatic operation and a built-in motor winder.
The program-only exposure simplifies operation to its most basic — the photographer composes and focuses while the camera handles aperture and shutter speed automatically. The K-mount accepts all Pentax lenses, and the built-in winder provides automatic film advance.
Build quality is basic Pentax consumer with lightweight construction. The P3 serves as the simplest possible K-mount SLR, providing interchangeable lens photography without the complexity of manual exposure modes.
The P3 offers the cheapest K-mount SLR body on the used market. The program-only limitation frustrates photographers who want creative control, but for those who want the simplest possible film SLR experience, it provides K-mount capability at zero cost.