ZOOM STEREO MICROSCOPE WITH BINOCULAR HEAD Magnification range: 10X-40X Viewing Head: Binocular Head with locked-in eyepiece45癷nclined, 360?rotation; Diopter adjustment +/-5dp; Interpupilary distance adjustment: 55-75mm; Sharp stereo erect image over a wide field view Eyepiece: WF 10X eyepiece Objective lenses: ZOOM 1X~4X Illumination: Upper reflected Halogen light: 12V / 10W; Down light: 12V / 10W; Electric apparatus has CE approval Optional accessories Eyepiece: WH5X, 22mm; SWF10X, 23mm; WF 15X, 13mm; WF 20X, 10mm; Objective: Auxiliary objective 0.5X, 0.75X, 1.5X, 2X Detail Information of Optical Parameters will be reached to your side if you want. Just let me know your effective E-mail address