Objective: Zoom 1x-4x Optional accesories:0.5x. 1.5x .2x auxiliary objective WF5x, SWF10x, WF15x, WF20x eyepiece, Information1.Sharp stereo erect image over a wide field of view. 2.45o inclined and 360o rotational binocular head with locked-in eyepiece.The left ocular-tube with diopter adjustment ±5dp,The interpupillary distance is between 55-75mm 3.Zoom objective 1x-4x 4.ZTX-E series supplied ...