Meade Instruments Infinity Telescope 50mm Brand New Includes One Year Warranty Product # 209001 The Meade Instruments Infinity 50mm Telescope is a refractor telescope. Its manual alt-azimuth mount has an altitude lock and slow-motion controls for precise tracking of subjects. This telescope comes with 3 eyepieces that provide 30x, 50x, and 150x magnifications with a 2x Barlow lens that doubles the magnification of each eyepiece for a wider-range of observing possibilities. An adjustable-height stainless steel tripod provides a stable platform for sky-watching, and the included 90 erect-image diagonal makes looking through the scope more comfortable, especially when aiming the telescope toward the zenith. The diagonal's prism corrects images horizontally and vertically, allowing the scope to be used for terrestrial viewing as well. An integrated dew-shield helps to prevent condensation on the outside objective lens. Infinity 50mm Telescope Features Achromatic Refractor Telescope 1.97 Inch Aperture 50 mm f/12 Focal Ratio 600mm Focal Length Red Dot Viewfinder 3x 1.25 Eyepieces Anti-Reflection Fully Multicoated Optics Rack and Pinion Focuser Dual Control Cables Specifications Clear Aperture 50mm Optical Design Achromatic Refractor Optical Coatings Fully Coated Focal Length 600mm Focal Ratio f/12 Viewfinder 5x24 Optical Viewfinder Eyepieces Three 3 1.25 Eyepieces SR 4mm, H12mm, H20mm Barlow 2x Focuser Mechanism Rack and Pinion Diagonal 90 Degree Erect-Prism Tripod Aluminum Tripod Finderscope Red-dot Finder Mount Type Alt-Azimuth