Objective:Zoom0.75x-5x ,Optional accesories:0.5x. 1.5x .2x Auxiliary objectiveHWF5x, HWF10x, HWF15x, HWF20x Eyepiece Ring light 1.Sharp stereo erect image over a wide field of view2.45°inclined and rotatable binocular head3.The interpupillary distance is between55mm-75mm,The left ocular-tube with diopter adjustment±5dp4.Inside incident light,brightness adjustable,various illumination for ...