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OPTICAL TUBE INFO: Optical Design Newtonian Reflector Aperture 127mm (5") Focal Length 1000mm (39") Focal Ratio f/7.87 Focal Length of Eyepiece 1 20mm (0.79") Magnification of Eyepiece 1 50x Focal Length of Eyepiece 2 4mm (0.16") Magnification of Eyepiece 2 250x Barlow Lens 3x Finderscope 5x24 Highest Useful Magnification 300x Lowest Useful Magnification 18x Limiting Stellar Magnitude 13 Resolution (Rayleigh) 1.1 arc seconds Resolution (Dawes) 0.91 arc seconds Light Gathering Power (Compared to human eye) 329x Secondary Mirror Obstruction 41mm (1.6") Secondary Mirror Obstruction by Diameter 32% Secondary Mirror Obstruction by Area 10% Optical Coatings Aluminum Optical Tube Length 508mm (20") MOUNT INFO: Mount Type German Equatorial Accessory Tray No-Tool Tray with Eyepiece holder Tripod Aluminum Software Starry Night Basic Edition
