Celestron Labs S20 Stereo Microscope10x Eyepieces2x Objective Lenses. The Celestron Labs S20 Stereo Microscope is the perfect introductory stereo microscope offered at an economical price. With its 20x power it's well suited for viewing details on 3D objects such as leaves insects and many other objects. The upper LED illuminator provides detailed viewing and with the removable stage plate there is an option for bottom lighting (user supplied). You'll enjoy exciting discoveries right out of the box with the two included insect specimens. The Celestron 20x Stereo Microscope is light and easy to carry in the field making it well suited for hobbyists and students. Specifications for Celestron Labs S20 Stereo Microscope: Eyepieces: (2) WF 10x-all glass Objectives: (2) 2x Magnification: 20x Focuser: Coarse focus Head: Upright binocular Interpupillary distance: 2.25" to 3.0" (57.15mm x 76.2mm) Working distance: 2.76 in (70 mm) Illumination: Top only-LED Battery Power: 2AA-included Stage: Simple stage with metal clips Accessories: (2) Bug Specimens encased in plastic Dimensions: 4 in x 5.3 in x 9.75 in (102 mm x 135 mm x 248 mm) Weight: 1lb-2 oz. (.49 kg) Features of Celestron Stereo Microscope: Great introductory stereo microscope with 20x power 10x eyepieces with 2x objective lenses Metal head with coarse focusing knob Upper LED illumination for detailed viewing Two insect specimens included Two AA batteries included Package Contents: Celestron Labs S20 Stereo Microscope Celestron 44207: Labs S20 Stereo Microscope10x Eyepieces2x Objective Lenses