Product Description: Endless Possibilities with K&F CONCEPT K&F CONCEPT's extensive range of over 300 lens adapter rings ensures seamless compatibility between various lens and camera sizes, empowering professionals to revitalize their old lenses. Crafted with meticulous precision and uncompromising quality, these adapters make it effortless to stay connected to your powerful imaging tools.

Function & Note: This lens adapter allows you to mount your Pentax K AF screw-mount lens onto your Sony E-mount camera. However, please note that a "No Lens Attached" warning message may appear, as the infinity mark [∞] of the telephoto lens is slightly shifted to the positive side to enable focus adjustment, even when focus shift occurs due to temperature changes. Be sure to verify the focus through the viewfinder, especially when shooting at infinity.

High Precision: The high-tolerance precision craftsmanship of this lens adapter ensures a seamless and secure interface between your lens and camera, enabling adjustable and focused use of your Pentax K AF screw-mount lenses on Sony E-mount cameras.

Instructions for Use: Attention: - This is a manual adapter without autofocus or aperture ring. - Install the adapter with care, avoiding excessive force. - Adapting an APS-frame lens to a full-frame camera may result in vignetting, but some cameras can correct this by adjusting the APS-C setting. - Adapting a full-frame lens to an APS-frame camera provides excellent edge-to-edge sharpness, as the smaller image field helps minimize lens distortion and aberration by utilizing the "sweet spot" or center of the larger lens image circle. This also magnifies the focal length by 1.6 on Canon, 1.5 on Nikon and Sony, and 2.0 on M4/3 cameras.

Infinity Focus Position: The position of the infinity mark [∞] on the telephoto lens is slightly shifted to the positive side to allow for focus adjustment, even when focus shift occurs due to temperature changes. The shift range is denoted by an L-shaped line, so be sure to check the focus through the viewfinder when shooting at infinity.

Matte-Black Internal Design: The internal matte-black finish of the adapter reduces glare and light reflections, ensuring you capture perfect exposures.

Manual Focus: Manual focus is achieved without electronic contacts, allowing you to manually control both focus and aperture adjustments when using this adapter. (Caution: Please enable the "Release w/o Lens" setting in your camera's menu to use the adapter.)

Unique Design: The 4th generation lens mount features a knurled design with non-slip treatment for easier handling, further enhanced by the fine CNC machining for a premium texture.

Materials & Features: - High-quality copper and aluminum alloy construction - High precision and durability for smooth installation and removal - Matte-black internal finish to prevent light reflection

Compatible Mounts: - Lens mount: Pentax K Series and AF Series Lenses - Camera mount: Sony E-mount camera bodies - Compatible models: Sony Alpha α7, α7R, α7S, α7 II, α7R II, α7S II, α3000, α5000, α6000, α6300, α6500, α3500, α5100, αQX1, PXW-FS7, NEX-3, NEX-5, NEX-C3, NEX-5N, NEX-7, NEX-F3, NEX-5R, NEX-5T, NEX-6, NEX-F3, NEX-3N, NEX-VG10, NEX-VG20, NEX-VG30, NEX-VG900, NEX-FS100, NEX-FS700, NEX-EA50, and more.

Pre-purchase Verification: Please ensure your lens and camera mounts are compatible before purchase to avoid any unnecessary returns. Our team is here to assist you with any questions about the adapters.

product information: