Sky-Watcher
Sky-Watcher StarTravel 102AZ3 f/4.9 Doublet Refracting Telescope
Best price $400 · 102mm aperture · $/mm 3.92
Buy on Amazon ↗At $3.92 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 | 102 mm |
|---|---|
| Focal length | 500 mm |
| Focal ratio | f/4.9 |
| Type | Refractor |
| Resolving power | 1.14″ (Dawes limit) |
| Limiting magnitude | 12.5 |
| Max useful magnification | 204x |
| Light gathering | 212x the naked eye |
| Optical design | Doublet Refractor |
| Highest magnification | 204x |
| Dawes limit | 0.23 arcseconds |
| Tube length | 500mm |
| Tube weight | 6.5 lbs |
| Eyepiece fitting | Female 2" Filter/Wide T—Ring (M48x0.75) |
| Best for | 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 | $400 |
Updated:
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