Pentax's pro K-mount SLR — the K2 DMD, aperture-priority auto with motor-drive support, 1976.
The Pentax K2 DMD of 1976 was a professional-oriented member of the first K-bayonet generation that replaced the M42 screw mount. The DMD suffix denoted Data-Motor-Drive compatibility, marking it out for accessory motor winds and databacks. It sat at the top of the original K-series alongside the K2, KX and KM as Pentax established its long-running K lens system.
This is a 35mm film SLR using the Pentax K bayonet, giving open-aperture TTL metering with K-mount lenses. It has an electronically-timed vertical-travel focal-plane shutter offering aperture-priority automatic exposure plus manual speeds, and a fixed eye-level pentaprism with an instant-return mirror. Because the timing is electronic, the automatic and most manual speeds require a battery. Metering is centre-weighted TTL, and the body added coupling for a motor drive and databack.
The K2 DMD suits professional and serious photographers who want an early K-mount body with aperture-priority automation and motor-drive support for documentary and portrait work. It handles solidly and benefits from the immediate move to the modern K bayonet, which stayed in production for decades. It pairs with the large and long-lived Pentax K lens system.
As a mid-1970s electronic body, checks matter. Inspect and expect to replace perished foam light seals and mirror-damper foam. Test the electronically-timed shutter across auto and manual for even, accurate speeds, as ageing electronics can drift. The meter and auto exposure need a working battery; modern silver-oxide cells suit this later design better than the mercury-era Spotmatics. Check the pentaprism for desilvering or foam haze, and test the advance, rewind and any motor-drive contacts. The long-lived K mount keeps lens choice wide.