The SV503 series includes SV503 102ED telescope refractor OTA and SV193 0.8x flattener & focal reducer. It is suitable for visual observation and deep-sky photography.
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| Product Name | SV503 70F6 ED Astronomy Telescope | SV503 80F7 ED Astronomy Telescope | SV503 102F7 ED Astronomy Telescope |
| Type | Refractor | Refractor | Refractor |
| ED Glass | S-FPL51 | S-FPL51 | S-FPL51 |
| Coating | SMC | SMC | SMC |
| Aperture | 70mm / 2.75-Inch | 80mm /3-Inch | 102mm / 4.01-Inch |
| Focal length | 420mm | 560mm | 714mm |
| Focal Ratio | f/6 | f/7 | f/7 |
| Type of Focuser | RAP (Rack and Pinion) | RAP (Rack and Pinion) | RAP (Rack and Pinion) |
| Gear Reduction | 1:10 Fine movement | 1:10 Fine movement | 1:10 Fine movement |
| Resolving capacity | 1.97" | 1.5" | 1.17" |
| Limit value | 11.3 | 11.6 | 12.1 |
| Light gathering capacity | 100x | 130.6x | 212x |
| Max. Useful magnification | 140x | 160x | 204x |
| Tube weight | 3.35kg | 3.95kg | 5.5kg |
| Tube outer diameter | 88mm | 121mm | |
| Tube material | Aluminum | Aluminum | Aluminum |
| Back Focus Length | 90mm | 90mm | 101.9mm |
| OTA Length | 318mm | 465mm | 630mm |
| Dovetail & Ring | Yes | Yes | Yes |
| Dovetail Length | 150mm | 137mm | 200mm |
| Model | SV193 | |||
| SKU | W9152B | W9152D | ||
| Back focus | 55mm | |||
| Barrel size | 2-inch | 2-inch | ||
| Threads Standard | M48*0.75 | M48*0.75 | ||
| Lens Structure | 3-Elements/2Groups | 3-Elements/2Groups | ||
| Lens Coating | FMC | FMC | ||
| Blackened Lens Edges | Yes | Yes | ||
| Net Weight | 164g / 5.78oz / 0.36lb | 177g / 6.24oz / 0.39lb | ||
1. The popular SV503 series refractor will provide the best optical quality, whether you use it for Deep-Sky Object or Planets, visual or photography;
2. The compatible SV193 reducer will increase the field of view and improve the image flatness， which is essential for deep-sky photography.
Applicable Accessories
US$ 49.99 ~ US$ 62.99
_md.jpg "SV135 Zoom Eyepiece 1.25inch 7mm to 21mm 57°-40° Field of View for Astronomical Observation")
US$ 49.99 ~ US$ 119.99
