Harga Celestron C6-A-XLT ( CG-5) Optical Tube Assembly

OVERVIEW 6" Schmidt-Cassegrain Optical Tube Assembly Aluminum Optical Tube Celestron' s premium StarBright XLT coatings 1500 mm focal length ( f/ 10) 25 mm eyepiece included ( 60x) Visual back allows for use with 1.25" accessories 6x30 finderscope to help accurately find objects Star diagonal provides more comfortable viewing position when observing objects that are high in the sky Includes dovetail rail compatible with CG-5 Advanced Series mount ITEM # 91010-XLT IN STOCK Description General Features 6" Schmidt-Cassegrain Optical Tube Assembly Aluminum Optical Tube Celestron' s premium StarBright XLT coatings 1500 mm focal length ( f/ 10) 25 mm eyepiece included ( 60x) Visual back allows for use with 1.25" accessories 6x30 finderscope to help accurately find objects Star diagonal provides more comfortable viewing position when observing objects that are high in the sky Includes dovetail rail compatible with CG-5 Advanced Series mount Specifications Optical Design Schmidt-Cassegrain Aperture ( mm) 150 mm ( 5.91 in) Focal Length 1500 mm ( 59 in) Focal Ratio 10 Focal Length of Eyepiece 1 ( mm) 25 mm ( 0.98 in) Magnification of Eyepiece 1 60 x Finderscope 6x30 Star Diagonal 1.25 Optical Tube Aluminum - black Fastar Compatible No Highest Useful Magnification 354 x Lowest Useful Magnification 21 x Limiting Stellar Magnitude 13.4 Resolution ( Rayleigh) 0.93 arc seconds Resolution ( Dawes) 0.77 arc seconds Light Gathering Power ( Compared to human eye) 459 x Apparent Field of View .83 ° Linear Field of View ( @ 1000 yds) 44 ft ( 13 m) Secondary Mirror Obstruction 2.2 in ( 56 mm) Secondary Mirror Obstruction by Diameter 37% Secondary Mirror Obstruction by Area 14% Optical Coatings StarBright XLT Optical Tube Length 16 in ( 406 mm) Optical Tube Weight 10 lbs ( 4.54 kg) Dovetail Compatibility CG-5 Mount Technology StarBright XLT Warranty 2 Years