Sky-Watcher
Sky-Watcher StarTravel 120 AZ3 f/5 Doublet Refracting Telescope
Best price $550 · 120mm aperture · $/mm 4.58
Buy on Amazon ↗At $4.58 per mm of aperture, this is dearer per millimetre than the typical refractor at $2.94/mm — you're paying for something other than raw aperture.
Specs
| Aperture | 120 mm |
|---|---|
| Focal length | 600 mm |
| Focal ratio | f/5.0 |
| Type | Refractor |
| Resolving power | 0.97″ (Dawes limit) |
| Limiting magnitude | 12.9 |
| Max useful magnification | 240x |
| Light gathering | 293x the naked eye |
| Optical design | Doublet Refractor |
| Highest magnification | 240x |
| Dawes limit | 0.19 arcseconds |
| Tube length | 600mm |
| Tube weight | 6.5 lbs |
| Eyepiece fitting | Female 2" Filter/Wide T—Ring (M48x0.75) |
| 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.
Prices
| Retailer | Price | |
|---|---|---|
| OPT | $550 |
Updated:
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