OPTICAL TUBE INFO: Optical Design Refractor Aperture (mm) 70 mm (2.76 in) Focal Length 700 mm (28 in) Focal Ratio 10 Focal Length of Eyepiece 1 (mm) 20 mm (0.79 in) Magnification of Eyepiece 1 35 x Focal Length of Eyepiece 2 (mm) 4 mm (0.16 in) Magnification of Eyepiece 2 175 x Barlow Lens 3 x Finderscope 5x24 Star Diagonal 1.25" Erect Image Diagonal MOUNT INFO: Mount Type German Equatorial Accessory Tray No-Tool Tray with Eyepiece holder Tripod Aluminum Highest Useful Magnification 165 x Lowest Useful Magnification 10 x Limiting Stellar Magnitude 11.7 Resolution (Rayleigh) 1.99 arc seconds Resolution (Dawes) 1.66 arc seconds Light Gathering Power (Compared to human eye) 100 x Optical Coatings Multi-Coated Warranty 2-year Telescope Warranty