Plano-Convex Lens  Plano-Concave Lenses     Bi-Convex Lenses  Bi-Concave Lenses   Focal Length at 546.1 nm +/- 1% Material BK-7,fine annealed optical glass Usable Wavelength Range 380 - 2100nm Surface Accuracy 3 fringes (1.5)Ppower, 1/2 fringe (/4) irregularity at 546.1nm over the clear aperture Clear Aperture central 90% of diameter Surface Quality 40-20 scratch-dig Centration 3 arc min Diameter +0/-0.1 mm Center Thickness 2.5 +/- 0.1mm Edge Thickness Nominal Value only Chamfer 0-0.8mm face width x 45o +/-15o typical Durability MIL-C-675C, moderate abrasion Cleaning Non-abrasive method,acetone or isopropyl alcohol on lens tissue recommended Product # Dia.(mm) EFL(mm) f/# BFL(mm) FFL(mm) P2 Tc R SPC010 6.35 -25 -3.9 -26.64 -25.00 -1.64 2.82 -12.92 SPC013 6.35 -12.5 -1.9 -14.14 -12.50 -1.64 3.16 -6.46 SPC016 12.7 -100 -7.8 -101.64 -100.00 -1.64 2.81 -51.68 SPC019 12.7 -75 -5.9 -76.64 -75.00 -1.64 2.92 -38.76 SPC022 12.7 -50 -3.9 -51.64 -50.00 -1.64 3.14 -25.84 SPC025 12.7 -25 -1.9 -26.64 -25.00 -1.64 3.83 -12.92 SPC028 25.4 -200 -7.8 -201.64 -200 -1.64 3.13 -103.57 SPC031 25.4 -150 -5.9 -151.64 -150 -1.64 3.34 -77.73 SPC034 25.4 -100 -3.9 -101.64 -100.00 -1.64 3.78 -51.68 SPC037 25.4 -75 -2.9 -76.64 -75.00 -1.64 4.22 -38.76 SPC040 25.4 -50 -1.9 -51.64 -50.00 -1.64 5.16 -25.84 SPC043 25.4 -25 -0.9 -26.64 -25.00 -1.64 9.39 -12.92 SPC064 50.8 -500 -9.8 -501.64 -500.00 -1.64 3.51 -258.61 SPC067 50.8 -250 -4.9 -251.64 -250.00 -1.64 4.53 -129.20 SPC070 50.8 -200 -3.9 -201.64 -200.00 -1.64 5.06 -103.57 SPC073 50.8 -150 -2.9 -151.64 -150.00 -1.64 5.94 -77.73 SPC076 50.8 -100 -1.9 -101.64 -100.00 -1.64 9.17 -51.68 SPC079 50.8 -75 -1.4 -76.64 -75.00 -1.64 9.95 -38-76