With individual eyepiece focusing, this giant binocular is designed for medium to long terrestrial and astronomical observation. Binocular20X90Code:303546ID FOCUS SYSTEM168 FT/1000YDS56M/1000MBAK4 PrismExit Pupil 4.5mmEye Relief: 18.0mmFold Down Eye CupWater/Fog ProofTripod Adaptable Binocular