Технические характеристики
- Lens Shape Plano-Convex
- Diameter 12.0 mm
- Lens Material N-BK7
- Antireflection Coating Uncoated
- Surface Quality 60-40 scratch-dig
- F/# 1.7
- Effective Focal Length (EFL) 20.0 mm
- Back Focal Length (BFL) 17.40 mm
- Radius of Curvature (R) 10.374 mm
- Edge Thickness (Te) 2.0 mm
- Center Thickness (Tc) 3.90 mm
- Principal Plane 2 (P2) -2.60 mm
- Centration &le,3 arc min
- Clear Aperture &ge,central 90% of diameter
- Cleaning See How to Clean Optics
