Feature:1. [3.5X To 45X] Continuous zoom ratio from 3.5X to 45X, 30mm ultra wide field of view WF10X eyepiece, trinocular interface can add photo or video function.2. [45 Degree Tilt] Trinocular analog microscope head tilted at 45 degrees, and with super wide viewing distance high eye position eyepiece.3. [High Resolution] With high resolution, good flatness and contrast, pointed stereo upright images over a wide field of view, clear original true color images.4. [Add Photo Or Video Function] Trinocular interface can add photo or video function, with large working distance, accurate alignment, ensure fatigue free viewing.5. [Optical Glass] Adopt optical glass elements, metal mechanical parts, adjustable interpupillary distance, so you can use it with confidence.Specification:Item Type: Zoom Trinocular Microscope HeadMaterial: Metal, glassApplication: Microscopic experimentHead: 45 degree tilt 360 degree rotation trinocular to simulate focus lengthEyepiece: 30mm ultra wide field of view high magnification lens WF10X/20Zoom Range: 6.5:1Trinocular Port: 23mm / 0.9in optical portInterpupillary Distance: 2-1/8in to 3in (54-76mm)Field of View: 1-1/4in (33mm)Working distance:Use 0.5X Objective Lens: 3.5X-45X(165mm)Head Installation Diameter: 3in (76mm)Accessories Installation Diameter: 1-7/8in (48mm internal thread).Package List:1 x Microscope Head2 x Eyepiece2 x 0.5X Object Lens2 x Rubber Eye Patch1 x Hex Wrench1 x Dustproof BagNote:This product is an optical instrument, please do not place the product in an environment that is too corrosive, humid and high temperature