Is the ZWO Seestar S50 a good first telescope?

Yes if what you mainly want is first astrophotography, sharing it with children, taking it with me: that is what this family does best. No if your priority is nebulae, clusters and galaxies, by eye, the moon and the planets: other families do better for the same money. It is a camera driven from a phone, not an eyepiece: you look at a screen. A good choice if the image is the goal; a poor one if seeing is.

How much does the ZWO Seestar S50 cost?

€560 observed on 2026-08-17. Prices move; that is what the date is for.

Smart telescope (30–80 mm, integrated camera)

ZWO Seestar S50

Name: ZWO Seestar S50
Brand: ZWO

A small telescope with a camera where the eyepiece would be, driven from a phone. It finds the target, tracks it, stacks exposures, and hands you an image in a few minutes.

€560indicative, seen 17 Aug 2026

All the sellers

50 mmAperture
f/5.0Focal ratio
3 kgTypical weight
8–100×Useful magnification

Should you buy it?

Yes if what you mainly want is first astrophotography, sharing it with children, taking it with me: that is what this family does best.
No if your priority is nebulae, clusters and galaxies, by eye, the moon and the planets: other families do better for the same money.
It is a camera driven from a phone, not an eyepiece: you look at a screen. A good choice if the image is the goal; a poor one if seeing is.

Computed from its family's per-goal scores and its own numbers — not a rating, not one evening's opinion.

Where to buy

Search at First Light Optics · Optique Unterlinden · Pierro Astro · Teleskop-Express (searches; neither price nor stock checked)

None of these links earn us anything.

Prices are observed on the date shown, never live. Links marked paid link earn us a commission and cost you nothing extra.

What it shows, really

No eyepiece to simulate: a smart telescope stacks photographs and shows the result on your phone. Its views are not comparable with visual telescopes — the guide below is the honest comparison.

Seestar or a real telescope? The guide →

The numbers

Aperture	50 mm
Focal ratio	250 mm · f/5.0
Mount	Integrated alt-az tracking, phone app
Typical weight	3 kg
Useful magnification	8× to 100× at 50 mm
Resolution (Dawes)	2.3″ — the tightest double star this aperture can split
Faintest star, suburban sky	around magnitude 9.8
Observed price	€560 indicative, seen 17 Aug 2026

Made for

First astrophotography
The shortest path from nothing to a recognisable image of a nebula.
Sharing it with children
A picture on a phone holds attention that a grey smudge in an eyepiece does not.
Taking it with me
Small, self-contained, battery powered.

Not made for

Nebulae, clusters and galaxies, by eye
It shows you deep sky, but not by eye. Score depends entirely on whether that distinction matters to you.
The Moon and the planets
Small aperture and short focal length. The Moon works; the planets are underwhelming.

The Sun, safely

Solar filter in the box (read on the listing)

The Sun with this model

The maker's solar filter is in the box and made for this instrument: nothing to buy, nothing to measure.

In white light: the larger sunspots and their groups. Dawes' limit on the Sun: 2.3″ (116 ÷ 50 mm, arithmetic).

Every time

A certified solar filter over the FRONT of the instrument, fastened so it cannot slip or blow off.
Cap or remove the finder. It is a second telescope, and it has no filter.
Never a filter at the eyepiece end: the concentrated sunlight there can crack it in an instant.
With children, an adult is there every time.
Never look, or point, without the filter on. Check it before each use; a scratched or torn filter goes in the bin.

Sources for the Sun

American Astronomical Society — How to View a Solar Eclipse Safely — filters on optics go on the front; eclipse glasses never with optics; children supervised
American Astronomical Society — Solar Filters for Optics — eyepiece filters are dangerous; the finder capped, removed or filtered; the filter attached securely
American Astronomical Society — About the ISO 12312-2 Standard — EN ISO 12312-2:2015 covers naked-eye viewers only; no international standard covers filters on telescopes, binoculars or lenses
Société astronomique de France — Guide des observations solaires — a filter at the front, never one screwed into the eyepiece, the finder capped
NASA — Keep Your Eclipse Glasses to See the Sun's ‘Freckles’ — a large enough sunspot shows through eclipse glasses
AAVSO — Le Guide d'Observation Solaire de l'AAVSO, v1.1 (2017), p. 6 — archived copy — “Les ouvertures plus grandes que 100 à 125 mm sont généralement limitées par les effets de turbulence atmosphérique”; 50 to 80 mm is enough to count sunspots

The family it belongs to: Smart telescope (30–80 mm, integrated camera)

What it does well

Shows colour and structure in nebulae that no eyepiece at this aperture ever will
Works under a city sky far better than visual observing does
Set up in minutes, operated from indoors if it is cold

What it costs you

There is nothing to look through. If the appeal is photons hitting your own retina, this is the wrong category
The image is the instrument's, not yours — limited control over how it is made
A fast-moving product category; anything written about it dates within a year

Worth knowing about this model

No eyepiece and no way to fit one. Under a city sky it will show you more nebulae in an evening than a 200 mm will show you all year — and you will not have seen any of them with your own eye.

Everything about Smart telescope (30–80 mm, integrated camera) →