I'm a beginner with cameras. I'm using a Nikon F-mount, but I don't understand mounts. I'm unsure. If you can identify the mount from the photos, or if you know a lot about them, please help. From a beginner's perspective, it's relatively clean. The lens looks clear when I look through it. There is no front cap. This is a used item, stored and cleaned by an amateur. Thank you for your understanding. Please feel free to ask any questions, request additional photos, or negotiate the price in the comments. I'm looking forward to hearing from you.