Gskyer
Gskyer AZ70400 70mm Refractor
Best price $96 · 70mm aperture · $/mm 1.39
$96 on Amazon ↗At $1.39 per mm of aperture, this is better value than most refractor telescopes we track, which sit around $2.94/mm.
Specs
| Aperture | 70 mm |
|---|---|
| Focal length | 400 mm |
| Focal ratio | f/5.7 |
| Type | Refractor |
| Mount | Alt-Az |
| Resolving power | 1.66″ (Dawes limit) |
| Limiting magnitude | 11.7 |
| Max useful magnification | 140x |
| Light gathering | 100x the naked eye |
| Weight | 2.5 kg |
| Best for | Budget starter |
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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