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 D25.4 F40 Diameter 25.4mm focal length 40mm plano convex lens D15 F40 Diameter 15mm focal length 40mm plano convex lens D12.7 F40 Diameter 12.7mm focal length 40mm plano convex lens D25.4 F50 Diameter 25.4mm focal length 50mm plano convex lens