Two models, the numbers decide
ZWO Seestar S30 Pro or ZWO Seestar S50?
ZWO Seestar S30 Pro — 30 mm, €749. ZWO Seestar S50 — 50 mm, €560. The same method as everywhere on this site: the numbers first, the verdict from them.
Same family (Smart telescope (30–80 mm, integrated camera)): what changes between these two is aperture, bulk and price — not character.
Side by side
The ZWO Seestar S50 collects 2.8× more light — that is what aperture buys.
| ZWO Seestar S30 Pro | ZWO Seestar S50 | |
|---|---|---|
| Aperture | 30 mm | 50 mm |
| Focal ratio | 160 mm · f/5.3 | 250 mm · f/5.0 |
| Typical weight | 1.7 kg | 3 kg |
| Setup time | 4 minutes | 4 minutes |
| Learning curve | 1 out of 5 | 1 out of 5 |
| Useful magnification | ≤ 60× | ≤ 100× |
| Resolution (Dawes) | 3.9″ | 2.3″ |
| Observed price | €749 (seen 2026-08-23) | €560 (seen 2026-08-17) |
The same sky, through both
Both are smart telescopes: no eyepiece to simulate. They stack photographs; the comparison is the spec sheet, the weight and what each app delivers.
Choose the ZWO Seestar S30 Pro if…
- it has to be carried: 1 kg lighter
Full page on the Seestar S30 Pro →
Where to buy
- Astroshoppaid link€749 seen 2026-08-23ships DE, FR, EU
- Amazon.frships FR
- First Light Opticsships GB
- Optique Unterlindenships FR
- Pierro Astroships FR
- Teleskop-Expressships DE, EU
1 of these 6 links earn us a commission, marked above. Sorted by price, never by what pays. How this site is funded.
Choose the ZWO Seestar S50 if…
- budget decides: €189 less
- you want the most sky: 2.8× the light
Full page on the Seestar S50 →
Where to buy
- Amazon.frships FR
- First Light Opticsships GB
- Optique Unterlindenships FR
- Pierro Astroships FR
- Teleskop-Expressships DE, EU
None of these links earn us anything.