Specifications: Optical Design: Schmidt Cassegrain Aperture: 203.2mm Focal Length: 2032 mm Focal Ratio: 10 Focal Length of Eyepiece 1: 40 mm Focal Length of Eyepiece 2: 13 mm Magnification of Eyepiece 1: 51x Magnification of Eyepiece 2: 156x Finderscope:StarPointer Star Diagonal:1.25" Mount Type:Single Fork Arm Altazimuth Tripod:Stainless Steel Power Requirements:Internal battery included HIghest Useful Magnification:480x Lowest Useful Magnification:29x Limiting Stellar Magnitude:14 Resolution (Rayleigh):0.69 arc seconds Resolution (Dawes):0.57 arc seconds Light Gathering Power (Compared to human eye):843x Secondary Mirror Obstruction:2.5 in(64 mm) Secondary Mirror Obstruction by Area:9.77% Optical Coatings:StarBright XLT Optical Tube Length:17 in Max Slew Speed:4 degrees per second Tracking Rates:Sidereal, solar and lu...