Celestron AstroMaster 90EQ Maksutov-Cassegrain Telescope with Equatorial Mount
Celestron AstroMaster 90EQ Maksutov-Cassegrain Telescope with Equatorial Mount
Celestron AstroMaster 90EQ Maksutov-Cassegrain Telescope
The Celestron AstroMaster 90EQ is a Maksutov-Cassegrain telescope for beginners and back-garden observers who want high-contrast views of the planets and the Moon's craters and maria. Its 90mm aperture and 1250mm focal length suit planetary detail, and the compact tube sits on a sturdy equatorial mount with an adjustable tripod for quick, relaxed evening sessions outdoors.
Contrast Where Simpler Scopes Blur
Basic refractors often show coloured fringes around bright planets, and some reflectors need regular mirror adjustment. A Maksutov-Cassegrain combines a corrector lens and mirrors, giving bright, sharp images that show virtually no chromatic aberration. Instead of a separate secondary mirror, a small reflective spot is applied directly to the inside of the corrector plate, so the telescope does not need frequent collimation like a Schmidt-Cassegrain. That secondary spot is also smaller than a traditional Schmidt-Cassegrain secondary, which is where the signature high-contrast view comes from.
What Sets It Apart
- 1250mm focal length at f/14: a long focal ratio well matched to detailed planetary and lunar viewing.
- Manual equatorial mount: two slow motion control knobs give fine adjustments in Right Ascension and Declination.
- Two eyepieces: 20mm for 62x and 10mm for 125x magnification, plus an erect image diagonal.
- Accessory tray: keeps eyepieces and small items close at hand while you observe in the dark.
Maksutov-Cassegrain Telescope Optical Specifications
| Attribute | Specification |
|---|---|
| Brand | Celestron |
| Model | AstroMaster 90EQ |
| Optical design | Maksutov-Cassegrain |
| Aperture | 90mm |
| Focal length | 1250mm |
| Focal ratio | f/14 |
| Eyepieces | 20mm (62x), 10mm (125x) |
| Light gathering | 165x the human eye |
| Optical coatings | Fully coated |
| Mount | Manual German equatorial |
| Tripod | 2 section, adjustable |
| Finder | StarPointer red dot finderscope |
| Material | Aluminium, steel |
| Weight | 9.9 kg |
For Planet Watchers in the Back Garden
Adjust the tripod legs to your height, or perch the telescope on a picnic table for a steadier view over the fence. With the StarPointer finder and erect image diagonal, it is just as easy to scan distant scenery by day as to follow Jupiter by night.
Available Right Now
The Celestron AstroMaster 90EQ Maksutov-Cassegrain telescope is in stock at Tech Accessories Store with rapid mainland delivery.
FAQs
Q: Will it need its mirrors adjusting often?
A: No. Because the secondary is a reflective spot on the inside of the corrector plate, the Maksutov design does not require frequent collimation the way a Schmidt-Cassegrain does, which suits beginners who just want to observe.
Q: How does the equatorial mount track objects?
A: The AstroMaster EQ mount has two slow motion control knobs, letting you make fine pointing adjustments in both Right Ascension and Declination to follow objects manually as they drift across the night sky.
Q: How soon will the telescope be delivered?
A: Tech Accessories Store sends the AstroMaster 90EQ by rapid mainland delivery, and tracking is emailed once the courier collects it, so you can plan the first clear night of observing.