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Optical Design Newtonian Reflector Aperture (mm) 127 mm (5 in) Focal Length 1000 mm (39 in) Focal Ratio 7.87 Focal Length of Eyepiece 1 (mm) 20 mm (0.79 in) Magnification of Eyepiece 1 50 x Focal Length of Eyepiece 2 (mm) 4 mm (0.16 in) Magnification of Eyepiece 2 250 x Barlow Lens 3 x Finderscope 5x24 Mount Type German Equatorial Accessory Tray No-Tool Tray with Eyepiece holder Tripod Aluminum Highest Useful Magnification 300 x Lowest Useful Magnification 18 x Limiting Stellar Magnitude 13 Resolution (Rayleigh) 1.1 arc seconds Resolution (Dawes) 0.91 arc seconds Light Gathering Power (Compared to human eye) 329 x Apparent Field of View 0.8 ° Linear Field of View (@1000 yds) 43 ft (13 m) Secondary Mirror Obstruction 1.6 in (41 mm) Secondary Mirror Obstruction by Area 10 % Secondary Mirror Obstruction by Diameter 32 % Optical Coatings Aluminum Optical Tube Length 20 in (508 mm) ITEM WILL BE SOLD AS IT IS.2-3 TIMES USED.ALMOST NEW.BOUGHT FROM SINGAPORE.ALL PAPERS AVAILABLE. SLIGHTLY NEGOTIABLE.PLS.CONTACT-01711521093 |