D12 F-30 Diameter 12mm focal length 30mm concave lens Sent E-mail INQUIRY DETAILS D12 F-30 Diameter 12mm focal length 30mm concave lens ←[Previous:D12 F30 Diameter 12mm focal length 30mm plano convex lens] [Next:D12 F24 Diameter 12mm focal length 24mm optical glass lens]→ RELATED D18 F36 Diameter 18mm focal length 36mm plano convex lens D12 F20.7 Diameter 12mm focal length 20.7mm optical glass lens D12.7 F15 Diameter 12.7mm focal length 15mm plano convex lens D25.4 F35 Diameter 25.4mm focal length 35mm plano convex lens