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The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. For views of the brighter deep space objects like galaxies and nebulae, we recommend the larger aperture and light gathering ability of the Newtonian reflectors.
|Aperture (mm)||90 mm (3.54 in)|
|Focal Length||1000 mm (39 in)|
|Focal Length of Eyepiece 1 (mm)||20 mm (0.79 in)|
|Magnification of Eyepiece 1||50 x|
|Focal Length of Eyepiece 2 (mm)||10 mm (0.39 in)|
|Magnification of Eyepiece 2||100 x|
|Star Diagonal||Erect Image Diagonal - 1.25"|
|Tripod||1.25" steel tube legs|
|Highest Useful Magnification||213 x|
|Lowest Useful Magnification||13 x|
|Limiting Stellar Magnitude||12.3|
|Resolution (Rayleigh)||1.55 arc seconds|
|Resolution (Dawes)||1.29 arc seconds|
|Light Gathering Power (Compared to human eye)||165 x|
|Apparent Field of View||1 °|
|Linear Field of View (@1000 yds)||53 ft (16 m)|
|Optical Coatings||Multi Coated|
|Optical Tube Length||36 in (914 mm)|
|Warranty||2-year Telescope Warranty|
|Item code||Item name||Quantity||Price|
|R42UQ||Celestron - 21063 - AstroMaster 90AZ Refractor Telescope||(1+)||£167.99|
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