- Built-in Flat-Field: Designed for effortless astrophotography, ensuring high-quality images;
- ED Extra-Low Dispersion Glass: Features a 4-element ED lens with FPL51 and lanthanum special glass to reduce chromatic dispersion;
- Dual Speed Focusing: 1:10 gear ratio for precise focusing;
- Light-Gathering Ability: With a focal ratio of f/6.78, it enables crisp, high-magnification observations;
- Retractable Lens Hood: The retractable hood blocks stray light for better contrast;
- 1.25" and 2" interfaces: Can switch eyepiece types freely.
Note: It needs to be paired with a diagonal to be in focus.
Special offers and product promotions
SVBONY SV503 70mm f/6.78 Refractor Telescope
The SVBONY SV503 70 ED telescope features a 4-element built-in field flattener that eliminates field curvature, providing a flat, wide view free from edge blur or distortion, allowing observers to explore the universe with clarity.
With f/6.78 and a generous 70mm aperture. SVBONY SV503 refractor telescope delivers bright, sharp images of distant galaxies,nebulae and star clusters.
SV503 telescope featuring ED glass, this advanced material not only reduces color dispersion but also enhances light transmission.
Coarse adjustment knob, enables rapid movement of the optical system to achieve a rough focus. Fine adjustment knob is used for minute adjustments to obtain optimal image clarity, enhancing your viewing experience.
CNC machining ensures a perfect fit for components such as threads and bayonets, prevents optical axis deviation, and enhances wear resistance.
Retractable lens hood can blocks stray light, easy to store, and adjustable in length to meet your needs.
SV503 70 ED OTA + SV705C Planetary Camera + SV165 Guide Scope + SV905C Guide Camera, suitable for astronomical photography.
SV503 70 ED OTA + SV215 Zoom Eyepiece + SV188P Diagonal + SV182 Finder Scope + SV224 Universal Dovetail + SV211 Handle Bar,suitable for visual observation.
Interference Report for SV503 70 ED OTA(Upgraded)
Great in every way
| 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 |
Package Includes:
SV503 70 f/6.78 OTA*1
2"-1.25" Adapter*1
Lens Cover*1
Pair Telescope Tube Ring*1
Dovetail Plate*1
1.25" Dust Cover*1
