Features for XTL Series Zoom Stereomicroscope Viewing head: 45° Inclined, 360° Rotatable binocular head; The inter-pupillary distance adjustable between 55-75mm, diopter adjustment of range ± 5mm. Eyepiece: Wide field, high-eyepoint eyepice. It can observe image of observation specimen with glasses Objective: Zoom objective magnification 0.70X-4.5X Magnification range: Between 3.5X-180X. Working distance: 100mm, special maximum working distance can provide more working space for you. Illumination: Built-in and built-out illumination system. (Include: Halogen lamp, Ring fluorescence lamp and ring LED lamp. ) Focusing: Two focusing knobs also used for tension adjustment, slide range 49mm.