Black Friday Sale:Flatfield Refractor Telescope for Astrophotography SV503 70 | Svbony
4 | Reviews- Built-in Flat-Field: Designed for effortless astrophotography, ensuring high-quality images;
- ED Extra-Low Dispersion Glass: Features a 2-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 or an extension tube to focus.
Click here for SV503 70ED New vs. Old
SVBONY SV503 70mm f/6.78 Refractor Telescope
The SVBONY SV503 70 ED telescope features a 2-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 + 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)
Customer Reviews
Sergio Martine
Nov 06, 2025
Hi there,I want to share with you this photo — it was almost entirely taken with your equipment. details: Telescope: Svbony 503 70 mm (new version) Filters: DualBand SV220 Ha-OIII and SV220 SII-OIII Camera: ASI294MC Object: IC1396 Total integration time: 17 h 30 m
Anthony
Oct 24, 2025
My team recently purchased one of these as a test telescope for an Astronomy course here at Princeton University. We have not had the chance to use it yet, however I must say I am very impressed with the quality of materials, machining and tolerances.
Jim Johnson
Oct 20, 2025
Nice scope for astrophotography. Good widefield view for large deep sky objects. Great affordable quality too. Very happy 👍
Edoardo Baffigo
Jul 16, 2025
The telescope arrived on time, perfectly packaged, and without any external damage. The instrument is very compact, sturdy, and solid. The focus is precise and holds up very well to a DSLR. The extendable lens hood maintains its position even when pointed at the zenith. The optical performance is perfect, with no color shift or vignetting. The ideal instrument to take with you into dark places.
| 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
