This zoom stereo microscope includes a 3.5X-45X trinocular head and an articulating arm with clamp. It provides crystal clear sharp images and versatile flexibility. It offers 13:1 large zoom magnification power 8 (200mm) large working distance and 2-1/2 (65mm) super wide field of View. This microscope is a perfect inspection microscopy system. It is an ideal instrument for research labs gemologists or anyone in semiconductor or electronic industry. Features : A great 3.5X-45X trinocular stereo zoom microscope on an articulating arm with clamp 45 degree inclined trinocular head with SUPER widefield high-eyepoint eyepieces Trinocular design for photo/video capability Sharp stereo erect images over a wide field view Crystal clear original true color 8 (200mm) large working distance 30mm SUPER widefield 10X eyepieces Adjustable interpupillary distance Both ocular-tubes with adjustable diopter High-eyepoint design for comfortable observation especially for glass wearers High resolution with great flatness and contrast Accurate alignment ensuring a fatigue-free long time view Full optical glass elements Precise ground glass lens Versatile articulating stand with clamp covering extremely large working area Heavy duty articulating arm stand with clamp finished with stain resistant enamel All metal mechanical components Rubber eye guards included Manufactured under ISO 9001 quality control standard Excellent five (5) year manufacturer warranty Specifications : Head: 45 degree inclined 360 degree rotatable trinocular Eyepieces: 30mm super widefield high-eyepoint 10X Barlow Lens: 0.5X Objective Zoom Range: 0.35-4.5X Zoom Ratio: 13:1 Working Distance: 8 (200mm) Field of View: 2-1/2 (65mm) super widefield Diopter Adjustment: +/-5dp Interpupillary Distance: 2-3/16 - 2-15/16 (55-75mm) Stand: heavy duty articulating arm with clamp Accessories: eye-guards Packing List : One Trinocular Zoom Microscope Head One Pair of Super Widefield High-eyepoint 10X Eyepieces One Super Widefield 0.5X Barlow Lens One Articulating Arm with Clamp One Focusing Rack One Pair of Eye-guards Shipping Weight: 30 lbs