Celestron
Celestron AstroMaster 90AZ
Best price $299 · 90mm aperture · $/mm 3.33
$299 on Amazon ↗At $3.33 per mm of aperture, this is priced about in line with other refractor telescopes, which average $2.94/mm.
Specs
| Aperture | 90 mm |
|---|---|
| Focal length | 1000 mm |
| Focal ratio | f/11.1 |
| Type | Refractor |
| Mount | Alt-Az |
| Resolving power | 1.29″ (Dawes limit) |
| Limiting magnitude | 12.3 |
| Max useful magnification | 180x |
| Light gathering | 165x the naked eye |
| Weight | 6.4 kg |
| Best for | Entry refractor |
Resolving power, limiting magnitude, maximum useful magnification and light grasp are derived from the aperture — the standard formulas, not marketing claims.
Compare
Celestron AstroMaster 102AZ f/6.5 Doublet Refracting Telescope
Celestron Inspire 100AZ Refractor
Explore Scientific FirstLight 80mm Refractor with Twilight Nano Mount
Closest alternatives by price in the same class. Head-to-head pages exist where people actually search for the comparison.