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telescope AstroMaster 70AZ

Code: 21061
Description

telescope refractor, D70, F900, f/12.86

Price: $209
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Optical Design Refractor
Aperture (mm) 70 mm (2.76 in)
Focal Length 900 mm (35 in)
Focal Ratio 13
Focal Length of Eyepiece 1 (mm) 20 mm (0.79 in)
Magnification of Eyepiece 1 45 x
Focal Length of Eyepiece 2 (mm) 10 mm (0.39 in)
Magnification of Eyepiece 2 90 x
Finderscope Built-on StarPointer
Star Diagonal Erect Image Diagonal - 1.25"
Mount Type Altazimuth
Tripod 1.25" steel tube legs
Highest Useful Magnification 165 x
Lowest Useful Magnification 10 x
Limiting Stellar Magnitude 11.7
Resolution (Rayleigh) 1.99 arc seconds
Resolution (Dawes) 1.66 arc seconds
Light Gathering Power (Compared to human eye) 100 x
Apparent Field of View 1.1 °
Linear Field of View (@1000 yds) 58 ft (18 m)
Optical Coatings Fully Coated
Optical Tube Length 36 in (914 mm)
Warranty 2-year Telescope Warranty

 

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