ASPHERICAL LENSES ELIMINATE VIRTUALLY ALL DISTORTION; QUICK\, SMOOTH CENTRAL FOCUSING ; TRIPOD ADAPTABLE; DIOPTER CONTROL TO REGULATE VISION IMBALANCE; BAK4 HIGH INDEX PRISMS; PRECISION ALIGNED SHARP MULTICOATED OPTICS FOR BRIGHT\, CLEAR IMAGES; FULL-SIZE ARMORED BODY ; 16 X 50MM