About this product
Model: cel_astromaster_90eq
Part Number: 21064-CGL
Celestron Astromaster 90EQ Telescope
Discover our Solar System with the Celestron AstroMaster 90EQ! You’ll be ready to observe in minutes thanks to the quick and easy no-tool setup. The 90EQ provides bright, clear images of the Moon, planets, star clusters, and more for great nighttime viewing.
Manual German Equatorial telescope
The AstroMaster mount comes with two slow motion control knobs that allow you to make fine pointing adjustments to the telescope in both Right Ascension and Declination axes, also referred to as RA and DEC.
Accessories Included
Accessories include a 20mm and 10mm eyepiece, erect image diagonal, and a finderscope. The two eyepieces offer different magnifications for low and high powered views.
Starry Night Software
Download Celestron’s Starry Night Software and learn about the night sky, celestial objects, and how to plan your next observing session. Celestron Starry Night Software is the premier astronomy software package on the market, providing resources and knowledge to view our solar system and beyond.
IMPORTANT
Never look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result.
Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.
Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.
What's in the box
- Optical tube
- Tripod and mount (preassembled)
- 20mm and 10mm eyepiece
- Red-dot finderscope
- Manual
Specifications
| Optical Design: | Refractor |
| Aperture: | 90mm (3.54") |
| Focal Length: | 1000mm (39.37") |
| Focal Ratio: | f/11 |
| Focal Length of Eyepiece 1: | 20mm (.78") |
| Magnification of Eyepiece 1: | 50x |
| Focal Length of Eyepiece 2: | 10mm (.4") |
| Magnification of Eyepiece 2: | 100x |
| Barlow Lens: | Not Included |
| Finderscope: | Built-on StarPointer™ red dot finderscope |
| Star Diagonal: | Erect Image Diagonal - 1.25" |
| Highest Useful Magnification: | 213x |
| Lowest Useful Magnification: | 13x |
| Limiting Stellar Magnitude: | 12.3 |
| Resolution (Rayleigh): | 1.55 arc seconds |
| Resolution (Dawes): | 1.29 arc seconds |
| Light Gathering Power (Compared to human eye): | 165x |
| Optical Coatings: | Fully Coated |
| Optical Tube Length: | 770mm (30.3") |
| Optical Tube Diameter: | 90mm (3.54") |
| Optical Tube Weight: | 4.4 lb (2 kg) |
| Dovetail: | CG-3 Dovetail bar |
| MOUNT INFO: | |
| Mount Type: | CG-3 Equatorial |
| Height adjustment range (includes mount and tripod): | 812.8mm - 1295.4mm (32" - 51") |
| Tripod Leg Diameter: | 31.75mm (1.25") steel |
| Accessory Tray: | Yes |
| Tripod Weight: | 9.3 lbs (4.24 kg) includes weight of mount |
| Slew Speeds: | Manual |
| Dovetail Compatibility: | CG-3 saddle plate |
| Software: | Celestron Starry Night Basic Edition Software and SkyPortal App |
| Total Kit Weight: | 13.7 lbs (6.21 kg) |
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