Harga Celestron C14-AF XLT ( CGE) Optical Tube Assembly

OVERVIEW 14" Schmidt-Cassegrain Optical Tube Assembly Aluminum Optical Tube Fastar Compatible Celestron' s premium StarBright XLT coatings 3910 mm focal length ( f/ 11) 40 mm 1.25" eyepiece included ( 98x) Visual back allows for use with 2" accessories 9x50 finderscope to help accurately find objects 2" mirror diagonal provides more comfortable viewing position when observing objects that are high in the sky Includes dovetail rail compatible with CGE mount ITEM # 91038-XLT IN STOCK Description General Features 14" Schmidt-Cassegrain Optical Tube Assembly Aluminum Optical Tube Fastar Compatible Celestron' s premium StarBright XLT coatings 3910 mm focal length ( f/ 11) 40 mm 1.25" eyepiece included ( 98x) Visual back allows for use with 2" accessories 9x50 finderscope to help accurately find objects 2" mirror diagonal provides more comfortable viewing position when observing objects that are high in the sky Includes dovetail rail compatible with CGE mount Specifications Optical Design Schmidt-Cassegrain Aperture ( mm) 355.6 mm ( 14 in) Focal Length 3910 mm ( 154 in) Focal Ratio 11 Focal Length of Eyepiece 1 ( mm) 40 mm ( 1.57 in) Magnification of Eyepiece 1 98 x Finderscope 9x50 Star Diagonal 1.25 Optical Tube Aluminum Fastar Compatible Yes Highest Useful Magnification 840 x Lowest Useful Magnification 51 x Limiting Stellar Magnitude 15.3 Resolution ( Rayleigh) 0.39 arc seconds Resolution ( Dawes) 0.33 arc seconds Light Gathering Power ( Compared to human eye) 2581 x Secondary Mirror Obstruction 4.5 in ( 114 mm) Secondary Mirror Obstruction by Diameter 32% Secondary Mirror Obstruction by Area 10% Optical Coatings StarBright XLT Optical Tube Length 31 in ( 787 mm) Optical Tube Weight 45 lbs ( 20 kg) Dovetail Compatibility CGE Mount Technology StarBright XLT Warranty 2 Years