| 38-552 35.0mm Dia. x 50.0mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 35-719 2.0mm Dia. x 3.0mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-LASF9 | Circular |
| 88-775 3.0mm Dia. x 4.5mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-LASF44 | Circular |
| 88-779 3.0mm Dia. x 12.0mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 88-787 4.5mm Dia. x 9.0mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 88-788 5.0mm Dia. x 5.0mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-LASF44 | Circular |
| 88-795 5.0mm Dia. x 30.0mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 38-568-INK 6.0mm Dia. x 10mm FL; YAG-BBAR; Inked; Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 88-808 6.0mm Dia. x 72.0mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 88-814 9.0mm Dia. x 22.0mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 88-818 9.0mm Dia. x 54.0mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 88-820-INK 9.0mm Dia. x 90.0mm FL; YAG-BBAR; Inked; Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 88-821-INK 10.0mm Dia. x 10.0mm FL; Inked; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-SF11 | Circular |
| 45-505-INK 25.0mm Dia. x 30.0mm FL; VIS-NIR; Inked; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 45-511 25.0mm Dia. x 85.0mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 45-511-INK 25.0mm Dia. x 85.0mm FL; VIS-NIR; Inked; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 45-512 25.0mm Dia. x 100.0mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 33-367 25.0mm Dia. x 400.0mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 47-387 25.0mm Dia. x 500.0mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 47-387-INK 25.0mm Dia. x 500.0mm FL; VIS-NIR; Inked; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 62-604-INK 25.4mm Dia. x 88.9mm FL; VIS-NIR; Inked; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 47-390 30.0mm Dia. x 120.0mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 33-385-INK 40.0mm Dia. x 80.0mm FL; VIS-NIR; Inked; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 47-393-INK 50.0mm Dia. x 125.0mm FL; VIS-NIR; Inked; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 45-718 50.0mm Dia. x 150.0mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 47-394 50.0mm Dia. x 175.0mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 86-911 75.0mm Dia. x 75.0mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 38-494-INK 12.0mm Dia. x 25mm FL; VIS-NIR; Inked; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 38-503 12.5mm Dia. x 20mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 38-503-INK 12.5mm Dia. x 20mm FL; VIS-NIR; Inked; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 38-520 15.0mm Dia. x 50.0mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 38-524-INK 18.0mm Dia. x 50.0mm FL; VIS-NIR; Inked; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 38-547 25.4mm Dia. x 150.0mm FL; VIS-NIR Coated; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 38-548-INK 35.0mm Dia. x 35.0mm FL; VIS-NIR; Inked; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-SF11 | Circular |
| 38-561-INK 35.0mm Dia. x 70.0mm FL; VIS-NIR; Inked; Plano-Convex Lens VIS-NIR 400-1000nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| 35-717 2.0mm Dia. x 1.5mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-LASF9 | Circular |
| 35-720 2.0mm Dia. x 4.0mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-LASF9 | Circular |
| 88-774 3.0mm Dia. x 3.0mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-SF11 | Circular |
| 88-789 5.0mm Dia. x 7.5mm FL; YAG-BBAR Coated Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-SF11 | Circular |
| 88-790-INK 5.0mm Dia. x 10.0mm FL; YAG-BBAR; Inked; Plano-Convex Lens YAG-BBAR 500-1100nm | Optics | Lens | Spherical Lens (Plano-Convex) | Edmund Optics | N-BK7 | Circular |
| SLB-25-170NIR2 25.0 mm Dia. x -170.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-80NM 30.0 mm Dia. x -80.0 mm FL; Coated; Plano-Concave Lens 400-700nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-35NM 30.0 mm Dia. x -35.0 mm FL; Coated; Plano-Concave Lens 400-700nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-40NM 30.0 mm Dia. x -40.0 mm FL; Coated; Plano-Concave Lens 400-700nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25.4-70NM 25.4 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 400-700nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-10-30NIR1 10.0 mm Dia. x -30.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-10-60NIR1 10.0 mm Dia. x -60.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-15-50NIR1 15.0 mm Dia. x -50.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-20-150NIR1 20.0 mm Dia. x -150.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25-40NIR1 25.0 mm Dia. x -40.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25-60NIR1 25.0 mm Dia. x -60.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25-200NIR1 25.0 mm Dia. x -200.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25.4-60NIR1 25.4 mm Dia. x -60.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25.4-80NIR1 25.4 mm Dia. x -80.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-15-70NIR2 15.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-20-70NIR2 20.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-20-120NIR2 20.0 mm Dia. x -120.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25-200NIR2 25.0 mm Dia. x -200.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25.4-30NIR2 25.4 mm Dia. x -30.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25.4-40NIR1 25.4 mm Dia. x -40.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-10-15NIR2 10.0 mm Dia. x -15.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-10-25NIR2 10.0 mm Dia. x -25.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-10-80NIR2 10.0 mm Dia. x -80.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-15-50NIR2 15.0 mm Dia. x -50.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-20-30NIR2 20.0 mm Dia. x -30.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-20-50NIR2 20.0 mm Dia. x -50.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25-40NIR2 25.0 mm Dia. x -40.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25-60NIR2 25.0 mm Dia. x -60.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25-70NIR2 25.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25-80NIR2 25.0 mm Dia. x -80.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25-150NIR2 25.0 mm Dia. x -150.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25.4-50NIR2 25.4 mm Dia. x -50.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25.4-70NIR2 25.4 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-50NM 30.0 mm Dia. x -50.0 mm FL; Coated; Plano-Concave Lens 400-700nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-60NM 30.0 mm Dia. x -60.0 mm FL; Coated; Plano-Concave Lens 400-700nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-70NM 30.0 mm Dia. x -70.0 mm FL; Coated; Plano-Concave Lens 400-700nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-200NM 30.0 mm Dia. x -200.0 mm FL; Coated; Plano-Concave Lens 400-700nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-40-80NM 40.0 mm Dia. x -80.0 mm FL; Coated; Plano-Concave Lens 400-700nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-40-100NM 40.0 mm Dia. x -100.0 mm FL; Coated; Plano-Concave Lens 400-700nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-50.8-90NM 50.8 mm Dia. x -90.0 mm FL; Coated; Plano-Concave Lens 400-700nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-35NIR1 30.0 mm Dia. x -35.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-40NIR1 30.0 mm Dia. x -40.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-150NIR1 30.0 mm Dia. x -150.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-50-90NIR1 50.0 mm Dia. x -90.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-50-100NIR1 50.0 mm Dia. x -100.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-50-120NIR1 50.0 mm Dia. x -120.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-50-150NIR1 50.0 mm Dia. x -150.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-50-170NIR1 50.0 mm Dia. x -170.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-50-200NIR1 50.0 mm Dia. x -200.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-50-220NIR1 50.0 mm Dia. x -220.0 mm FL; Coated; Plano-Concave Lens 633-1064nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-80NIR2 30.0 mm Dia. x -80.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-90NIR2 30.0 mm Dia. x -90.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-30-100NIR2 30.0 mm Dia. x -100.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-40-60NIR2 40.0 mm Dia. x -60.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-40-80NIR2 40.0 mm Dia. x -80.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-50.8-150NIR2 50.8 mm Dia. x -150.0 mm FL; Coated; Plano-Concave Lens 750-1550nm | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-10-90N 10.0 mm Dia. x -90.0 mm FL; Plano-Concave Lens Uncoated | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-15-50N 15.0 mm Dia. x -50.0 mm FL; Plano-Concave Lens Uncoated | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-20-40N 20.0 mm Dia. x -40.0 mm FL; Plano-Concave Lens Uncoated | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |
| SLB-25.4-200N 25.4 mm Dia. x -200.0 mm FL; Plano-Concave Lens Uncoated | Optics | Lens | Spherical Lens (Plano-Concave) | OptoSigma | N-BK7 | Circular |