The Pentax ME was a 1976-introduced, aperture priority automatic camera with an electronic focal plane shutter from 8 s to 1/1000 s, synchronized at 1/100 s. The shutter curtains were metal and had a vertical movement. There was no shutter dial, and the camera could not be used in manual mode, except for B and 1/100 exposures. The Pentax-invented digital light meter was of the standard TTL open aperture center weighted type. It was activated by a slight pressure on the release button.
The Pentax ME had a 0.97× viewfinder, covering 92% of the field. The finder screen was fixed, with a split image and a microprism ring in the center. The shutter speed chosen by the camera was displayed in the finder, the aperture was not.
There was a hot shoe on the top of the prism and a self-timer. The selector around the release button had four positions: L (lock), Auto, 100X (1/100, X sync) and B. The Pentax ME could attach an external winder ME I (1.5 i/s) or the later ME II (2i/s). The Pentax ME could also mount a Dial Data ME databack, or the later Digital Data M databack via a cord adapter.
The lenses were interchangeable with the K bayonet mount. Together with the ME and MX was introduced the SMC Pentax-M series of compact lenses.