This is a super widefield multi-power binocular stereo microscope head with 5X 10X 15X and 30X magnification settings. It includes a 0.5X Barlow lens and a pair of super widefield high-eyepoint WH10X/20 eyepieces coming with 45° inclined 30mm eyetubes with diopter. Its super widefield optics and high-eyepoint design ensure an easy and comfortable observation. The microscope offers high resolution clear images super widefield of view and large working distance. It fits all the focusing racks with a 3 (76mm in diameter) O-ring holder. Features: 10X and 30X Magnification Settings 45° Inclined Binocular Head with 30mm Super Widefield WH10X/20 Eyepieces High Resolution with Great Flatness and Contrast Sharp Stereo Erect Images over a Wide Field View High Quality Clear Original True Color Images Ocular-Tube with Adjustable Diopter Large Working Distance Accurate Alignment Ensuring a Fatigue-Free Viewing Full Optical Glass Elements Precise Ground Glass Lens All Metal Mechanical Components Adjustable Interpupillary Distance Foldable Rubber Eyeguards Included Manufactured under ISO 9001 Quality Control Standard Excellent Five (5) Year Manufacturer Warranty Specifications: Head: 45° inclined 360° swiveling binocular Eyepiece: WH10X/20 super widefield 30mm high-eyepoint Barlow Lens: 0.5X Objective: 1X and 3X Diopter Adjustment: ?5dp Interpupillary Distance: 1-7/8 - 2-15/16 (47-75mm) Field of View: 1.575 (40mm) @ 5X Working Distance: 8 (200mm) Head Mounting Size: 3 (76mm) in diameter Accessory Mounting Size: 1-7/8 (48mm female thread) in diameter Packing List: One 10X and 30X Binocular Stereo Zoom Head One Pair of Super Widefield WH10X/20 Eyepieces One 0.5X Super Widefield Barlow Lens One Pair of Foldable Rubber Eye-Guards User s Manual Shipping Weight: 10 lbs