K&F Concept Lens Mount Adapter Compatible with M42 Lens to NEX E-Mount Camera Compatible with Sony Alpha NEX-7 NEX-6 NEX-5N NEX-5 NEX-C3 NEX-3

I have this lens (bought it new 50 years ago) and it is still in prime condition. It is a M47 screw mount. I have adapted it to my A6500 and works fine except the focus at infinity is a little off. This happens when the flange distance is a little off. This lens has a pin that would feed back the aperture to the camera (I had Pentax ES). The 2 adapters linked below I bought. They had plus/minus but both worked. https://www.amazon.com/dp/B00LECY8OW?th=1 https://www.amazon.com/dp/B003YBPRHI?th=1