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 D25.4 F50 Diameter 25.4mm focal length 50mm plano convex lens D15 F-20 Diameter 15mm focal length -20mm BCC Biconcave double concave lens D12 F30 Diameter 12mm focal length 30mm plano convex lens D25.4 F50.8 Diameter 25.4mm focal length 50.8mm plano convex lens