OKS lenses test on BMMCC. OKS1-25-1 T2.7, OKS2-20-1 T1.9, OKS3-15-1 T2 compared to Yashica ML 28mm and 50 mm OKS 15mm T2.0 + ND   OKS 20mm T1.9 + ND   Yashica 50mm f1.4 +ND    OKS 15mm T2.8    OKS 20mm T2.8    OKS 25mm T2.7    Yashica 28mm f2.8   Yashica 50mm f2.8     OKS 15mm T4   OKS 20mm T4   OKS 25mm T4   Yashica 2