Sky-Watcher
Sky-Watcher Flextube 250P f/4.7 Dobsonian Telescope
Best price $1150 · 257mm aperture · $/mm 4.47
$1150 on Amazon ↗At $4.47 per mm of aperture, this is priced about in line with other dobsonian telescopes, which average $4.24/mm.
Specs
| Aperture | 257 mm |
|---|---|
| Focal length | 1200 mm |
| Focal ratio | f/4.7 |
| Type | Dobsonian |
| Mount | Dobsonian |
| Resolving power | 0.45″ (Dawes limit) |
| Limiting magnitude | 14.5 |
| Max useful magnification | 514x |
| Light gathering | 1347x the naked eye |
| Optical design | Dobsonian |
| Glass type | Borosilicate |
| Highest magnification | 514x |
| Dawes limit | 0.46 arcseconds |
| Tube length | 1118mm |
| Tube weight | 33 lb |
| Eyepiece fitting | 2" Nosepiece |
| Best for | Beginner, Visual |
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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