K&F Nikon AI Lenses to Pentax K Camera Mount Adapter with Optic Glass

The K&F Nikon AI to Pentax K Camera Mount Adapter with Optic Glass enables Nikon F-mount lenses to be used on Pentax K-mount DSLR cameras, supporting infinity focus and offering a durable, high-precision design.

The K&F Nikon AI Lenses to Pentax K Camera Mount Adapter with Optic Glass provides Pentax DSLR users the flexibility to mount Nikon F-mount lenses—including AI, AIS, and other manual-focus Nikon types—onto Pentax K-mount camera bodies. Designed with precision-engineered brass and aluminum, this adapter ensures a stable and secure connection, minimizing wear and maintaining alignment between lens and camera.

A built-in optical element allows infinity focus, making this adapter ideal for landscape, astrophotography, and general shooting where full focusing range is needed. Fully manual in operation, photographers will control both focus and aperture directly on the lens. It is compatible with a wide range of Pentax K-series cameras such as the K100D lineup, K10D, K20D, K-m, K-7, K-x, K-r, K-5 series, K-30, K-50, K-500, K-3 series, K-S1, K-S2, K-3 II, K-1, K-70, KP, and more.

For heavy lenses—especially older, metal-bodied Nikon telephoto or medium-format adapted lenses—use of a telephoto bracket and tripod is recommended to maintain balance and protect the camera mount.

Key Features:

• Adapts Nikon F / AI / AIS lenses to Pentax K-mount DSLR cameras
• Optical glass element allows infinity focus
• Constructed from durable brass and aluminum
• Manual focus and manual aperture operation
• Broad compatibility with Pentax K-series DSLRs
• Recommended tripod support for heavy lenses