Feature: 1. Clear Magnification: Comes with 2pcs 10X eyepiece, the microscope head also supports 3.5X to 100X continuous zoom magnification to meet your needs. 2. Very Firm in Fixing: The bracket in the lens group can firmly fix the lens, which will bring more stability and safety to your observation process. 3. Broader Application: Very suitable for observing the external microstructure of large objects, such as microelectronics, molds, jewelry and so on. 4. Better for Learning: The microscope group can help you learn and explore, and you can also operate on the things you are interested in after school. 5. Simple Installation: Designed to have a light weight and a compact size as well, the trinocular microscope head is very simple to install in minutes. Specification: Item Type: Microscope Head Head: 45?? tilt, 360?? rotation, three eyes in focus. Eyepiece: 30mm / 1.18in(approx.) ultra wide angle high eyespot WF10X/22. Target: 0.7-5X Zoom Range: 6.5:1 Three Eye Port: 25mm / 0.98in(approx.) photo port Pupil Spacing: Approx. 54 ~ 76mm / 2.13 ~ 2.99in Field of View: Approx. 33mm / 1.3in Working Distance: 7X-50X, that is, 100mm / 3.94in(approx.). When using 0.5X objective 3.5X-25X, that is, 200mm / 7.87in(approx.). When using 2X objective 14X-100X, that is, 50mm / 1.97in(approx.). Head Mounting Diameter: Approx. 76mm / 2.99in Accessory Installation Diameter: 1-7/8in, that is, 48mm / 1.89in(approx.) female thread. Features: 1. 3.5X to 100X continuous zoom magnification. 2. 45 degree tilt three eye analog focal head with ultra wide angle high eye eyespot eyepiece. 3. Three eye port with adding photo or video functions. 4. 30mm ultra wide visual field WF10X eyepiece, 20mm visual field. 5. High resolution with high flatness and contrast. 6. Clear stereoscopic upright image under wide field of vision. 7. Clear original image with true color. 8. Large working distance, accurate alignment, ensuring no fatigue viewing. 9. All optical glass elements. 10. Accurate frosted glass lens. 11. Adjustable pupil spacing. . Package List: 1 x Microscope Head2 x Eyepiece2 x Objective Lens2 x Eye Protection Washer1 x 0.5X Installation Adapter1 x Storage Bag1 x User Manual1 x Wrench