Short answer: ZWO discontinued the original Seestar S50, and the original S30 is sold out and replaced by the S30 Pro. For most buyers the Seestar S30 Pro ($699) is the better buy: a sharper 4K-class sensor, a wider view and lighter weight. Choose the S50 Pro ($999) if small galaxies and nebulae are your main targets. Buy a used S50 only at a clear discount.
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How we compared them: we have not tested these telescopes ourselves. This page compares manufacturer specifications, US prices and stock we checked on October 11, 2026, and limitations reported by independent reviewers, named next to each point.
Is the Seestar S50 discontinued?
Yes. On October 11, 2026, High Point listed the Seestar S50 as “discontinued” and not accepting back orders, and ZWO’s US store showed it sold out. AstroFaber reported that ZWO’s CEO confirmed the end of production at NEAF in April 2026, and the Seestar S50 Pro replaced it in August 2026. The original 30mm Seestar S30 shows as sold out at ZWO’s US store, and the S30 Pro has taken its place.
Existing S50 and S30 owners still use the same Seestar app. If you already own one, there is no need to replace it unless you want the newer sensor.
Specs side by side
| Seestar S50 | Seestar S30 Pro | Seestar S50 Pro | |
|---|---|---|---|
| Status, Oct 2026 | Discontinued | Current | Current (pre-order) |
| Aperture / focal length | 50mm / 250mm, f/5 | 30mm / 160mm, f/5.3 | 50mm / 260mm, f/5.2 |
| Sensor resolution | 1920 × 1080 (about 2 MP) | 3840 × 2160 (8.3 MP) + wide camera | 3840 × 2160 (8.3 MP) + wide camera |
| Field of view | 1.29° × 0.73° | 4.6° diagonal | 2.8° diagonal |
| Weight | 2.5 kg | 1.65 kg | 2.8 kg |
| Battery | 6,000 mAh, about 6 h | 6,000 mAh, about 6 h | 10,000 mAh, up to 9 h (ZWO) |
| Storage | 64 GB | 128 GB | 128 GB |
| Built-in filters | UV/IR, dual-band, dark | UV/IR, dual-band, dark | UV/IR, dual-band, dark |
| US price, Oct 11 | last listed $549, now sold out | $699 | $999 |
Figures are ZWO’s, from the S30 Pro and S50 Pro product pages and High Point’s S50 listing. The S30 Pro and S50 Pro diagonal fields work out to about 4.0° × 2.2° and 2.45° × 1.38°.
Field of view or detail: the real choice
The two current models trade view for scale. The S30 Pro’s 160mm focal length gives a wide field: the whole Andromeda Galaxy, about 3° long, fits with room around it, and so do the Pleiades and the large North America Nebula. The S50 Pro’s 260mm focal length frames a smaller patch of sky, so compact targets such as the Whirlpool Galaxy or the Ring Nebula appear larger, while Andromeda fills the frame edge to edge.
The old S50 had an even narrower field and a 2 MP sensor. Astronomy’s review noted that its frame cropped large targets such as M31 and M45 and that field rotation left dark corner wedges in long stacks (review).
None of the three is a planetary telescope. Jupiter and Saturn come out small, and ZWO’s S30 Pro FAQ says so directly.
Battery, weight and storage
The S30 Pro weighs 1.65 kg, light enough to carry to a dark site with a small tripod. The S50 Pro weighs 2.8 kg but carries a larger 10,000 mAh battery; ZWO rates it at up to nine hours in its lab test, while ScopeTrader measured about seven. Both Pro models have 128 GB of storage, double the original models.
EQ mode and the TH10
All Seestars work out of the box on an alt-azimuth mount, which keeps each exposure short because the field rotates as the sky turns. EQ mode tilts the telescope toward the celestial pole so it can take longer exposures, up to 60 seconds on the S50 Pro. It needs ZWO’s TH10 tilt head (about $99, sold separately) and a few minutes of polar alignment. ZWO sells an S30 Pro bundle with the TH10 head and TC20 tripod on Amazon.
Buying a used S50
A used S50 is still a capable telescope for the Moon, the Sun with its filter and bright nebulae. Pay well below the S30 Pro’s $699, since the newer model has the sharper sensor. Check that the seller includes the solar filter and tripod, that the unit connects and updates in the Seestar app, and how many charge cycles the battery has seen.
Which Seestar to buy
- First smart telescope, wide nebulae, travel: Seestar S30 Pro.
- Small galaxies and nebulae, longer sessions: Seestar S50 Pro.
- Tight budget and you find a fair used price: Seestar S50.
$699 at High Point on October 11, in stock.
Check the Amazon price →High Point: $699 →$999 at High Point on October 11, pre-order shipping mid-October.
Check the pre-order at High Point →Still deciding between brands? Compare the best smart telescopes of 2026 or read Seestar vs Dwarf 3 vs Celestron Origin.
Frequently asked questions
Is the Seestar S50 discontinued?
Yes. On October 11, 2026, High Point listed the S50 as discontinued and not accepting back orders, and ZWO’s US store showed it sold out. ZWO replaced it with the Seestar S50 Pro in August 2026.
Is the Seestar S30 Pro better than the S50?
In most ways, yes. The S30 Pro has a 3840 × 2160 sensor against the S50’s 1920 × 1080, twice the storage and a much wider field. The S50 has a larger 50mm aperture and longer focal length, so small targets appear bigger.
Should I buy the S30 Pro or wait for the S50 Pro?
Buy the S30 Pro if you want the wider view, lighter weight and lower price now. Choose the S50 Pro, $999 and shipping from mid-October, if you mostly want small galaxies and nebulae at a larger scale.
Can a Seestar photograph planets?
It can capture them, but they look small. ZWO’s own S30 Pro FAQ says it is not optimized for high-magnification planetary imaging.
Does the Seestar need a subscription?
No. The Seestar app was free on the US App Store on October 11, 2026. ZWO describes its remote access network as a free trial during a beta, with later pricing not announced.