Aven, 26800B-373-6, SPZ-50 Stereo Binocular Microscope with Double Arm Boom Stand and Focus Mount E-Erm Type with Built in IlluminationIncludes:1 ea. SPZ Binocular Stereo Zoom Microscope Body2 ea. 10x Eyepieces2 ea. Rubber Eyeguards1 ea. Dust Cover1 ea. Instruction ManualOne boom stand with metal baseUsers manualE-Arm Focus MountDimmer Control BoxFeatures22.5″ total reachAll metal constructionIdeal for use when large objects are to be viewedLarge zoom ratio 7.46:1- best zoom ratio in classField of View 34.3mm to 3.6mm (1.35″ to 0.14″)Working distance 108mm (4.25″) – the best in class17mm (0.67″) high eye point wide field 10x eyepieces (field number 23) for comfortable viewing even for operators with eyeglassesDiopter adjustment on both eyepiece tubes60 integrated LED ring light with dimmer controlMinimum 20,000 hours of high-output LED illuminationDouble Arm Boom StandThe wide range of the boom allows the microscope to easily scan across the subject. Features two locking knobs to adjust the horizontal and vertical position of the gliding arm. A heavy metal base provides excellent stability and a safety collar on the support post provides added protection for your inspection system.22.5 inch gliding arm provides smooth horizontal movementAllows positioning of microscopes over large areaHeavy duty all metal construction15 inch post with safety collarHeavy 11 x 10 inch base assures stability and spaceSPZ-50 Stereo Zoom MicroscopeAven's SPZ-50 Stereo Zoom Microscope has a magnification range of 6.7x-50x, which can be enhanced to up to 200x with optional auxiliary lenses and eyepieces.Large zoom ratio 7.46:1- best zoom ratio in classField of View 34.3mm to 3.6mm (1.35″ to 0.14″)Working distance 108mm (4.25″) – the best in class17mm (0.67″) high eye point wide field 10x eyepieces (field number 23) for comfortable viewing even for operators with eyeglassesDiopter adjustment on both eyepiece tubesE-Arm Focus Mount with LED Ring LightIncludes a built-in eco-friendly 60 LED Ring Light. The built-in ring light eliminates the potential risk of an external ring light coming loose and falling onto a specimen. The LED ring light also includes a dimmer control box.60 integrated LED ring light with dimmer controlMinimum 20,000 hours of high-output LED illumination.