Технические характеристики
- Lens Type Negative Achromatic Doublet
- Lens Shape Bi-Concave
- Diameter 25 mm
- Antireflection Coating 400-700 nm
- Coating Type Visible Single-Layer MgF2 (Ravg≤1.75% )
- Lens Material N-BAF10/N-SF10
- Surface Quality 40-20 scratch-dig
- Surface Accuracy, Irregularity λ/4
- Surface Accuracy, Power 1.5 λ
- Effective Focal Length (EFL) -50 mm
- Back Focal Length (BFL) -53.33 mm
- F/# 2
- Radius of Curvature (R) -35.51 mm
- Radius 2 24.58 mm
- Radius 3 217.99 mm
- Edge Thickness (Te) 9.06 mm
- Center Thickness (Tc) 6.56 mm
- Design Wavelengths 587.6 nm
- Centration
- Diameter Tolerance +0/-0.025 mm
- Focal Length Tolerance ±2%
- Center Thickness Tolerance ±0.2 mm
- Clear Aperture 24 mm
