- Utra-Clear 70ED Telescope OTA with Focal ratio f/6.78, provides excellent light-gathering ability, and enables crisp, high-magnification observations;
- 2-Element ED Extra-Low Dispersion Glass lens with FPL51 and lanthanum special glass, reduces chromatic dispersion, enhance color fidelity and image clarity;
- Built-in flat-field correction for effortless astrophotography;
- Dual Speed Fine Focusing, 1:10 gear ratio makes accurate focus, fine focus enables sharp focus in tough astrophotography;
- Retractable Lens Hood, blocks stray light, easy to store;
- 1.25" and 2" Interface, can switch eyepiece types freely, no need to replace the telescope body.
Pre-sale on Jun 20,2025
Special offers and product promotions
Specifications
| Brand | SVBONY |
| Model | SV503 |
| Aperture | 70mm/2.8" |
| Focal length | 474 mm/18.7" |
| Focal ratio | f/6.78 |
| Objective Type | 2-Element ED lens with FPL51 and lanthanum special glass |
| Corrector | 2-element corrector installed in the tube |
| Focuser | 2.5" RAP focuser with 2" reduction adapter and M54x0.75 female thread |
| Corrected and Flatfield | 32 mm/1.3" with 100% correction |
| Working distance from the 2" receptacle | 127.5 mm/5" |
| Tube length min. | 365mm/14.4" |
| Tube diameter | 82mm/3.2" |
| Dew shield diameter | 93 mm/3.7" |
| Tube weight incl. accessories | 2685g/5.9lb |
