Seestar S50 Discontinued? What Happened, the S50 Pro Reviewed, and What to Buy Instead

If you’ve been shopping for a Seestar S50 this fall, you’ve probably found empty listings or prices that make no sense. The S50 was the best-selling smart telescope of its generation, and it’s gone. This guide explains what happened, compares the old S50 with the S50 Pro that replaced it, summarizes what reviewers found about the Pro, and lays out the alternatives if $999 is more than you planned to spend.

We haven’t tested these telescopes ourselves. Everything here comes from ZWO’s and DWARFLAB’s spec pages, dealer listings, live Amazon prices on November 12, 2026, and independent reviews, which we name each time. Check today’s price before you buy.

What happened to the Seestar S50

Three things changed in 2026:

• ZWO stopped selling it. ZWO’s S50 product page now says the telescope is “currently out of stock and unavailable,” with its last price shown as $499.
• Dealers marked it discontinued. High Point Scientific lists the S50 as discontinued. The smaller original Seestar S30 went the same way: High Point lists it as discontinued too, and ZWO’s old S30 page now redirects to the new S30 Plus.
• The S50 Pro arrived. ZWO announced the Seestar S50 Pro as available on August 25, 2026. Astronomy.com reported an $899 introductory price and a $999 list price from September 15. On November 12, 2026, both Amazon listings (ZWO Store and Agena Astro) were at $999.

So if you see an “S50” listed new well above $499, read the title carefully: it may be the Pro, or an old unit from a reseller.

Seestar S50 vs S50 Pro: specs side by side

The biggest practical change is the sensor. Four times the pixels across a wider field means you can frame bigger objects and still crop in. The S50 Pro’s feature list also includes a dual-band filter, a dark filter, 8K deep-sky mosaics, an 8K Milky Way mode using the wide camera, and EQ mode with ZWO’s separately sold TH10 head. In the box you get a carbon tripod, a hard case and a solar filter.

Seestar S50 Pro review roundup

Three independent outlets have published full written reviews.

Digital Camera World called it a versatile two-camera smart telescope with impressive imaging. It measured battery life of well over six hours. Its cons: a higher price than the original, EQ mode needs an extra accessory, and serious planetary imagers should look elsewhere. ZWO itself says the S50 Pro isn’t suited to planets; expect Jupiter about 20 pixels across.

Live Science confirmed the solar filter in the box and weighed its sample at 2.7 kg. It found the included tripod very short and spotted typos in the app.

AstroBackyard is the one to read on the sensor. ZWO chose an OmniVision OS08B10 rather than a Sony chip, and AstroBackyard notes the switch “has caused controversy.” Sources even disagree on the details: Digital Camera World lists it as 1/1.25-inch, and Space.com’s launch article named Sony’s IMX585. ZWO’s spec page says OS08B10, so that’s what we use. AstroBackyard also reports battery drops in the cold and a one-year warranty on the battery (two years on the telescope).

Space.com’s November 2026 roundup picks the S50 Pro as the best value for small budgets. Our own score for it is 8.6 out of 10, the highest of any scope under $1,000 in our database. Read the full S50 Pro page for specs and sources, or check the price.

The alternatives

Seestar S30 Pro: lighter, wider, $335 less

The S30 Pro (about $664) has a 4K Sony IMX585 behind a 30 mm four-element ED lens, a 4K wide camera and the widest native field we track (about 4° × 2.2°). The Andromeda Galaxy fits in one S30 Pro frame; on the S50 Pro it needs two panels. The trade is light: 30 mm collects about a third of what 50 mm does, so faint galaxies need longer stacks. BBC Sky at Night, Digital Camera World and Fstoppers all rate it highly for beginners. Our S30 Pro vs S50 Pro comparison goes deeper. Check the price.

Dwarf 3: 4K for $549, plus daytime photography

The Dwarf 3 has 35 mm of aperture, a 4K Sony Starvis 2 sensor, a dual narrowband filter and a solar filter, in a 1.35 kg IP54 body that also tracks wildlife in daylight. BBC Sky at Night rated it 4 stars. Space.com found image capture time-consuming and wanted better instructions, and there’s no tripod in the box. See Dwarf 3 vs Seestar S30 Pro.

Seestar S30 Plus: the S50’s old price, in a smaller kit

The S30 Plus (about $474) is the closest you’ll get to the S50’s $499. It shares the S30 Pro’s lens but uses a 2K SmartSens sensor, 64 GB of storage and drops wide-angle mosaics. Tripod, case and solar filter are included. It launched November 10, 2026, so there are no independent written reviews yet.

Vaonis Vespera II: only on a discount

The Vespera II (about $1,590) matches the S50 Pro’s 50 mm aperture with a 4K IMX585, a refined app and an IP43 body. But it has no built-in filters, no EQ mode and about four hours of battery, and costs about $600 more. ScopeTrader notes rivals with filters or EQ tracking cost less. Consider it only at a clear discount.

If you buy the S50 Pro: what else you’ll need

The S50 Pro box covers the basics: tripod, case and solar filter. Three add-ons are worth knowing about.

• EQ mode. ZWO’s TH10 fluid head (about $94) tilts the scope to your latitude for longer, rotation-free exposures. ZWO says S50-series owners need only the head, not the TC20 tripod. Our EQ mode explainer covers setup.
• Power for cold nights. AstroBackyard saw battery life drop in the cold. A USB-C power bank such as the Anker 737 (about $99) keeps a long session going.
• Extra filters. The built-in dual-band filter handles most nebulae. For very bright skies, a third-party 2-inch filter adapter (about $13) lets you add a tighter filter in front of the filter wheel.

Which should you buy?

• You wanted the S50 for backyard galaxies and nebulae: the S50 Pro. It’s the true successor.
• You’ll travel with it, or want big nebulae and the Milky Way: the S30 Pro.
• You also want a wildlife camera, or $549 is the ceiling: the Dwarf 3, plus a tripod.
• You want the cheapest complete kit: the S30 Plus.

Check any of these against your own sky with the sky target checker, or let the telescope matcher narrow it down.

How we chose

We compared every current scope in our database at or below the S50 Pro’s price, plus the Vespera II as the other 50 mm option. Specs come from maker pages, with S50 figures from ZWO’s S50 product page and dealer listings. Scores weight image quality and optics at 35%, ease of use at 25%, portability and build at 20% and value at 20%. Details are on how we research.