Feature:1. Perfect Compatibility: This lens adapter is designed to fit for Pentax PK mount lenses onto M4 or 3 mount cameras seamlessly, making it a fantastic photography accessory.2. Full Manual Control: Operate with full manual functionality, including manual focus and manual aperture adjustment. The adapter lacks electronic contacts, so autofocus is not supported.3. Aluminum Alloy Construction: Crafted from aluminum alloy with an anodized finish, this lens converter ring is finely made and built to last, ensuring longevity and durability.4. Precise Exposure Control: Enables manual exposure and aperture priority exposure with the camera body, allowing for precise control over settings and infinite focus.5. Secure Fit: The lens mount adapter tightly integrates with the camera mount, providing a perfect match for smoother installation and easy lens attachment and removal.Specification:Item Type: Camera Lens AdapterMaterial: Aluminum AlloyCompatible Lens: for Pentax PK Mount LensCompatible Camera: for M4 or 3 Mount Camera.Package List:1 x Lens Adapter1 x Mount Cap