Product Overview

If you’re running classic M42 screw-mount glass on modern Pentax K bodies, this is the bit of kit that makes it all work properly. The Pentax Mount Adapter K (30120) is the genuine, factory-made adapter that lets Takumar and other M42 lenses lock into a K bayonet mount with the right register distance, so you keep infinity focus and a solid, rattle-free fit. No electronics, no gimmicks – just a precisely machined metal ring that does its job every time.

In the field, that means you can bolt your favourite Super Takumar onto a K-3 III, K-1 II or even an old K1000 and shoot with confidence. Aperture control stays on the lens, metering is done stopped down, and the adapter sits flush in the mount so handling feels natural, not like a clumsy spacer. It’s small enough to live on the camera, tough enough to cop regular lens changes, and avoids the jamming, misalignment and light leaks that plague cheap knock-offs. If you’re serious about running vintage M42 glass on a Pentax K body, this is the adapter you buy once and trust for the long haul.

Key Features

• Genuine Pentax Mount Adapter K (model 30120) allows M42 screw-mount Takumar and other classic lenses to be securely mounted on Pentax K-mount cameras, expanding your creative options with vintage glass.
• Precisely machined metal construction delivers a snug, reliable fit with minimal play, helping maintain accurate focus and alignment between lens and camera body.
• Designed to preserve infinity focus with screw-mount lenses, so telephoto and wide-angle optics perform as intended across their full focusing range.
• Simple bayonet and screw-in mounting process makes installation and removal straightforward, enabling quick swaps between native K-mount and adapted M42 lenses.
• Official Pentax design ensures better alignment of aperture and focus markings compared with many third-party adapters, making operation more intuitive when shooting.
• Compact, lightweight form factor adds virtually no bulk to your camera setup, keeping your kit portable while still accommodating a wide range of legacy lenses.
• Fully mechanical adapter with no electronic contacts offers dependable operation across generations of Pentax K-mount film and digital bodies without firmware concerns.
• Compatible with popular Pentax DSLRs such as the K-1 Mark II and K-3 III, letting you pair modern high-resolution sensors with characterful M42 optics.