Cyclop 85/1.5 M42 Helios-40 CZ Biotar copy Lichtries... (※I've selected Nikon F mount as the mount specification is unknown.) I purchased this from a shop in Georgia on Etsy a few years ago when I was into cameras. Originally a night vision scope lens, it has been threaded and can be used with M42 helicoid adapters etc. on mirrorless cameras. Medium telephoto, large aperture. Similar lens configuration to Helios 40. Since there is no aperture, it tends to flare in bright light. I bought it because I wanted to take emotional photos, but I couldn't take good pictures, so it's been stored in a dehumidified storage. It seems that if you can take good pictures, the surroundings will become a unique, hazy image. You can find sample photos by searching. I've sold my camera, so I can't confirm the photos. You'll have to judge by the appearance... The main image is everything I'm selling. Thank you very much...