This is a fisheye. Its geometry is specific. It’s stupid tocommplain about it, you yourself know what you are buying. Itcomrrects perfectly in lightroom => an excellent lens for landscapes. Regarding the lack of autofocus. I bought it for 10 thousand, new. Where you will find an autofocus lens (where it is not needed) and of such quality for such money, I don’t know. Yes, and you can’t talk about it as a disadvantage, again you know what you buy. \\\ I was very pleased with the lens. Great for shooting people, events, landscapes, night photos (astrophoto), architecture, animals. After this purchase, I bought another Korean Samyang 85 1.4, which I also liked. Sample photos on samyang 8/3.5- or here (there are all photos mixed up, but you can easily find a photo for this fisheye)