K&F CONCEPT Mount Adapter 【Compatible Lenses】Pentax K-mount DA lenses. 【Compatible Camera Bodies】Compatible with Sony a7CII, a7 IV/ I / II / III, a7R I / II / III / IV, a7S I / II / III a9 I / II, Alpha a3000 a3500 a5000 a5100 a6000 a6100 a6300 a6400 a6500 a6600 a6700, Alpha NEX-3 NEX-C3 NEX-F3 NEX-3N NEX-5 NEX-5N NEX-5R NEX-5T NEX-6 NEX-7, ZV-E10, ZV-E10 Mark II (ZV-E10M2), Smartshot QX1 QX10 QX30 QX100, Security SNC-VB770 UMC-S3C, Handicam NEX-VG10 NEX-VG20 NEX-VG30 NEX-VG900, NXCAM NEX-EA50 NEX-FS100 NEX-FS700, XDCAM FS5 FS5 II FS7 FS7 II, CineAlta VENICE, and other E-mount models. 【MF & Infinity Focus】When using this product, since there are no electronic contacts, focusing is done manually (MF), and aperture adjustments are also all manual operations. Infinity focus can be achieved. While using this adapter ring, other functions will not operate normally. (Turn off the camera power when attaching the adapter.) 【High Quality & Portability】Made of high-quality copper and aluminum alloy, it will not damage the lens body. Durability is also greatly improved. Lightweight and compact, it is excellent in portability. 【Easy Operation】Marked with a red indicator, align the indicators on the camera and lens and rotate to adjust accurately. It is easy to attach and detach the lens. ※ Equipped with an aperture ring on the adapter, allowing aperture adjustment on the adapter side while attached. ※ No returns or exchanges.