- Extra-Low Dispersion Lanthanum Glass
- Phase-Corrected Dielectric Roof Prisms
- Anti-Reflection, Fully Multicoated
- Wide 64° Apparent Angle of View
- Nitrogen Filled, Water and Fogproof
- Sturdy Closed-Bridge Configuration
- Lightweight and Strong Magnesium Chassis
- M46x0.75 Objective Filter Threads
- Large Center Focusing Knob
- Twist-Up Rubber Eyecups