With individual eyepiece focusing, this giant binocular is designed for medium to long terrestrial and astronomical observation. Binocular15X70303544ID FOCUS SYSTEM231 FT/1000YDS77M/1000MBAK4 PrismExit Pupil 4.7mmEye Relief: 18.0mmFold Down Eye CupWater/Fog ProofTripod Adaptable Binocular