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BTM 421 STEREO TRINOCULAR MICROSOPE: Trinocular Zoom body for works in research laboratory and high education works. Crisp: High resolution: Precision optics stereoscopic image. Zoom range: 0.7x to 4.5x with coaxial controls, with total parfocality and centering. Zoom ration: 6.5:1 Binocular Eye tubes inclined at 45° fatigue free viewing. Interpupilary distance adjustment from 54 mm to 75 mm. Trinocular body can be rotated a full 360° and locked in any position. Standard working distance: 91mm to 93 mm Working distance with optical auxiliary lenses: 34 mm to 251 mm. Accessories: With all necessary accessories and installation
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