Details
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.
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.
Additional Information
| Optical Design | Refractor |
|---|---|
| Aperture (mm) | 90 mm (3.54 in) |
| Focal Length (mm) | 1000 mm (39 in) |
| Focal Ratio | 11 |
| Eyepiece 1 (mm) | 20 mm (0.79 in) |
| Magnification 1 | 50 x |
| Eyepiece 2 (mm) | 10 mm (0.39 in) |
| Magnification 2 | 100 x |
| Finderscope | Built-on StarPointer |
| Star Diagonal | Erect Image Diagonal - 1.25" |
| Mount | CG-3 Equatorial |
| Tripod | 1.25" steel tube legs |
| Weight (lbs) | 27 lbs (12 kg) |
| 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 | 165 x |
| Angular Field of View (deg) | 1 ° |
| Linear Field of View (@1000 yds) | 53 ft (16 m) |
| Optical Coatings | Multi Coated |
| Optical Tube Length | 36 in (914 mm) |
| Tube Attachment | Dovetail Bar |
Related Products
Instructional Videos
Knowledge Base
- What size of scope is best for different kinds of objects?
- Aperture
- Focal length
- Contrast
- Light gathering power and magnitude limit
- Telescope-Astronomy Resources on the Web
- What does magnitude mean?
- Exit pupil
- What are diffraction-limited optics?
- What is the focal ratio? How is it related to the f-stop?
- Near focus
- Field of view
- Magnification or power
- Resolution - resolving power
- Optical design aberrations
- I have a 60mm refractor with a focal length of 900mm. Why can't I get a clear image when I try to use my 2x Barlow lens with my 6mm eyepiece?
- Why don't the images I see through my telescope look the same as photos I see taken with the same type of telescope?
- How far can I see with a telescope?
- How do you determine a telescope's magnification?
- Everything I see through my refractor is an inverted image. How can I correct the image?
- Rough polar alignment
- Why do I need polar alignment?
- Accurate polar alignment
- Precise polar alignment
- Polar alignment for the southern hemisphere
- Why does there appear to be a black circle in the middle of my image when I look at a star or planet?
- Why do I only see stars as points of light even when using my highest power eyepiece?
- What is back focus? What problems does it cause for visual and photographic use of my scope? What are related focus issues?
- I need to box up my scope and ship it. What's the best way to pack it?
- Why won't my image erecting eyepiece or image erecting diagonal always give right side up images with my scope?
- My StarPointer red-dot finderscope battery is dead. How do I replace it?
- What is field rotation? How does it affect my scope's viewing and imaging?
- What is a star party? Where do I find information on star parties in and around my area?
- I "accidentally" took apart my eyepiece, removing the lens that goes closest to my eye. Help! How do I put it back together?
- How do I use the setting circles on my Celestron German equatorial mount?
- How can I make my AstroMaster mount track stars?
- My AstroMaster scope's counterweights have a metal pin jammed in them and I can't mount them on the shaft. Help!
- I'm setting up my AstroMaster equatorial mount. Should the declination (DEC) slow motion cable (control) point towards the front or rear of the tube?
- I "accidentally" took apart my Celestron 20 mm erecting eyepiece. How do I put it back together?
- I can't find anything with my StarPointer-equipped telescope - help!
- What is my scope's StarPointer for? How do I use it?
- How do I collimate my AstroMaster telescope - refractor?
- How do I put a better finderscope on my AstroMaster or LCM scope?
Downloads
International Manuals
Quick Setup Guide for AstroMaster 70EQ and 90EQ (French) (3.81 MB | PDF)- Quick Setup Guide for AstroMaster 70EQ and 90EQ (German) (3.83 MB | PDF)
- Quick Setup Guide for AstroMaster 70EQ and 90EQ (Spanish) (3.8 MB | PDF)
- AstroMaster 90EQ and 130EQ Manual (Italian) (9.72 MB | PDF)
- AstroMaster 90EQ and 130EQ Manual (French) (9.77 MB | PDF)
- AstroMaster 90EQ and 130EQ Manual (German) (3.32 MB | PDF)
- AstroMaster 90EQ and 130EQ Manual (Spanish) (3.25 MB | PDF)
Manuals
- AstroMaster Manual (90EQ and 130EQ) (10 MB | PDF)
- Quick Setup Guide for AstroMaster 70EQ and 90EQ (3.81 MB | PDF)
Reference Materials
- Telescope Maintenance (English, French, German, Italian, Spanish) (640.68 KB | PDF)
- Telescope Basics (English, French, German, Italian, Spanish) (481.61 KB | PDF)
- Celestrial Observing (English, French, German, Italian, Spanish) (381.85 KB | PDF)
- Astronomy Basics (English, French, German, Italian, Spanish) (2.26 MB | PDF)
