Celestron
Celestron CGEM-II 800 EdgeHD Telescope - CE-12017
Best price $2879 · 203mm aperture · $/mm 14.18
$2879 on Amazon ↗At $14.18 per mm of aperture, this is dearer per millimetre than the typical catadioptric at $12.13/mm — you're paying for something other than raw aperture.
Specs
| Aperture | 203 mm |
|---|---|
| Focal length | 2032 mm |
| Focal ratio | f/10.0 |
| Type | Catadioptric |
| Mount | GoTo |
| Resolving power | 0.57″ (Dawes limit) |
| Limiting magnitude | 14.0 |
| Max useful magnification | 406x |
| Light gathering | 841x the naked eye |
| Optical design | Modified SCT |
| Highest magnification | 406x |
| Dawes limit | 0.57 arcseconds |
| Tube length | 432mm |
| Tube weight | 14 lbs |
| Eyepiece fitting | 2”x24 tpi |
| Warranty | 2 Year Warranty |
| 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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