Celestron
Celestron CGEM II 700 Maksutov Cassegrain Telescope
Best price $3299 · 180mm aperture · $/mm 18.33
$3299 on Amazon ↗At $18.33 per mm of aperture, this is dearer per millimetre than the typical catadioptric at $14.27/mm — you're paying for something other than raw aperture.
Specs
| Aperture | 180 mm |
|---|---|
| Focal length | 2700 mm |
| Focal ratio | f/15.0 |
| Type | Catadioptric |
| Mount | GoTo |
| Resolving power | 0.64″ (Dawes limit) |
| Limiting magnitude | 13.8 |
| Max useful magnification | 360x |
| Light gathering | 661x the naked eye |
| Optical design | Maksutov Cassegrain |
| Highest magnification | 360x |
| Dawes limit | 0.64 arcseconds |
| Tube length | 571.5mm |
| Tube weight | 19 lbs |
| Eyepiece fitting | 2" Nosepiece |
| Best for | Astrophotography, Visual, Planetary |
Resolving power, limiting magnitude, maximum useful magnification and light grasp are derived from the aperture — the standard formulas, not marketing claims.
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