Easy to focusAdjust the right position to suit your eyes.Close your right eye and see an object with your left eye, turn the center focus wheel until the image is sharp and clear.Open your right eye and close your left eye. Rotate the right eyepiece until the visible object is sharp and clear.Both sides (eyes) are now in focus and you will only need to use the center focus wheel to focus on other objects.Specifications:Magnification:8Prism system:BAK4Eyepiece diameter:22MMLens coating:FMC full broadband coatingObjective aperture:30MMFocusing system:lndependent leftand right eyepiecesField of view:8.3°Parallax compensation:Left and right eyesRanging range:145M/1000MTripod interface:NOExit pupil diameter:3.7MMProduct Size:150×125×55MMExit pupil distance 11.2MMnet weight:595GMain material:Copper metalPackage Includes:1*Anti-counterfeit color box1*Leather backpack1*General Instructions1*Wipe cloth1*Telescope1*Telescope mirror strip