M42 MOUNT SPIRAL: LOMO/LENKINAP OKC／OKS 35mmF2 cine-lens family: OKC1-35-1, OKC8-35-1, OKC11-35-1

https://spiral-m42.blogspot.com/2019/11/okcoks-35mm-f2-cinema-lense-family-okc1.html