Used about twice after purchase. The optical lens structure is formed by 7 groups and 10 lenses. The 8mm F3.5 UMC FISH-EYE CSⅡ features an aspherical hybrid lens and next-generation ultra-multi-coating to prevent flare and ghosting. Like other Samyang lenses, it uses a manual focus adjustment system. - Brand: Samyang - Type: Wide-angle lens, Fisheye - Mount Type: Nikon, F-mount - Lens Cap: Included - Lens Condition: Good Thank you for viewing.