Multi-layer lenses ,- A rubber coating offers the ideal protection against rough handling ,- Moisture resistant ,- Notches for thumb and fingers for extra non-slip comfort ,- Soft cover and strap for the telescope ,- Prism type: Ceiling prism BK-7 ,- Field of view (Angle of view): 7.4° ,- Field of view (Rectilinear ft. @1000m): 129 ,- Weight: 198g