| Product Specifications |
718 - 350mm |
| Lens Highlights |
Lanthanum-based front-focal flat field + professional stepless aperture |
| Objective Diameter |
Effective light-passing aperture of 18mm |
| Eyepiece Diameter |
Effective light-passing aperture of 17mm |
| Exit Pupil Distance |
17mm |
| Number of Objective Lens Groups |
One group with two lenses |
| Number of Eyepiece Lens Groups |
Four groups with five lenses |
| Whole-machine Lenses |
9 pieces of professional optical glass, including lanthanum-based glass |
| Lens Coating |
FMC coating with an average reflectance of less than 0.3%, and a balanced coating system is adopted to effectively eliminate color cast |
| Prism Material |
k9 + bak4 |
| Prism Coating |
Semi-five double-green high-reflectance dielectric coating, roof double-green phase coating |
| Imaging Distance |
Far (infinite) - near (about 17cm) |