$34.50
Specifications:
| Lens Form | Biconvex Lens | Material | N-BK7 |
| Diameters(mm) | 50.8(+0.0/-0.1) | Design Wavelength(nm) | 587.6 |
| Effective Focal Length EFL(mm) | 300.00±1% | Back Focal Length BFL(mm) | 198.31 |
| Coating | 1050-1580nm AR Coating | Surface Quality(S/D) | 40/20 |
| Irregularity@632.8nm | λ/2 | Centration Error(arc min) | ≤2 |
| Center Thickness | 5.1±0.1 | Edge Thickness | 3.0±0.1 |
| Curvature Radius R1 | 308.29 | Clear Aperture | 90% |
| Protective Chamfer | 0.2mmx45° |
