Celestron AstroMaster 90EQ Telescope
Celestron SKU: 21064 | Helix SKU: CT21064
Overview
- Quick and easy no-tool setup
- Permanently mounted StarPointer
- Erect image optics - Ideal for terrestrial and astronomical use
- Quick release dovetail attachment - no tool setup
- German Equatorial mount with Setting circles - to accurately locate and track sky objects
- Rugged pre-assembled tripod with 1.25" steel tube legs - Provides a rigid and stable platform
- All coated glass optics for clear, crisp images
- Deluxe accessory tray for convenient storage of accessories
- BONUS Astronomy Software download with a 10,000 object database, printable sky maps and 75 enhanced images
Description
If you're looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.
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.
Specifications
| Optical Tube Info: | |
|---|---|
| Optical Design | Refractor |
| Aperture (mm) | 90 mm (3.54 in) |
| Focal Length | 1000 mm (39 in) |
| Focal Ratio | 11 |
| 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 |
| Finderscope | Built-on StarPointer |
| Star Diagonal | Erect Image Diagonal - 1.25" |
| Mount Info: | |
| Mount Type | CG-3 Equatorial |
| 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 |
