3.5X‑90X Trinocular Stereo Zoom Microscope WF10X / 20mm Eyepieces Features: optical system for wider magnification. Each mirror is coated with a layer of special optical components, for clear and bright imaging. Using eyepiece and auxiliary objective lens, the magnification can be extended to 3.5X-90X. Super long effective working distance up to 30-165mm. The observation head can be tilted at 45 degrees and rotated 360 degrees, which will not cause eye fatigue after long time use. Adjustable tri-vision, ensure that different vision can get clear and satisfactory image. Variable double handwheel horizontal (axial) bilateral setting operation is convenient and comfortable, variable double repeat precision is high. Applicable to electronics industry, hardware processing, jewelry archaeology, textile printing, engineering plastics, biological dissection teaching and so on.   Specification: Material: Aluminum alloy Objective magnification: 0.7X-4.5X Observation: binocular tilt angle 45° Pupil distance adjustment range: 54mm - 76mm Adjustable bilateral visibility: ± 5 diopter Stage into a circular plate: 95mm black white plate Working distance: 30-165mm Working distance: 100mm Eyepiece interface: dedicated interface 1XCTV Adjustable focus bracket focus handwheel: 50mm (lifting range) Base plate size: 38*25*2cm / 15.0*9.8*0.8in Weight: Approx. 5800g / 204oz   Package list: 1 x Trinocular Stereo Microscope (Bracket included) 2 x 10X Eyepieces 2 x Silicone Eye Mask 1 x Dust Cover 3 x Dust Cap 1 x Screwdriver Tool 1 x Desiccant 1 x Hex Screwdriver 1 x LED Ring Light 1 x Power Adapter 1 x Camera Adapter Note:Please note that the product does not include auxiliary objectives.