D12 F20 Diameter 12mm focal length 20mm optical glass lens Sent E-mail INQUIRY DETAILS D12 F20 Diameter 12mm focal length 20mm optical glass lens ←[Previous:D12 F20.7 Diameter 12mm focal length 20.7mm optical glass lens] [Next:D12 F15 Diameter 12mm focal length 15mm optical glass lens]→ RELATED D12.7 F63 Diameter 12.7mm focal length 63mm optical glass lens D18 F36 Diameter 18mm focal length 36mm plano convex lens D12.7 F25 Diameter 12.7mm focal length 25mm plano convex lens D12 F20.7 Diameter 12mm focal length 20.7mm optical glass lens