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Chine, Suzhou · founded in 2011

The ZWO smart telescopes

The largest sales volume, and the largest community of users.

ZWO comes from demanding astrophotography. Its ASI cameras and its ASIAIR box equip thousands of amateur mounts. The Seestar carries that know-how over into an all-in-one device. It is the best selling of the devices compared here.

not tested In this catalogue: no shots at all. Entry built on public sources.

0 · aucune donnée de première main

0 towards 165h · hours I have logged with this device, this is not a rating

The range

Two devices in the comparison

Rapport d'ouverture : the focal length divided by the diameter, written f/, and the smaller that number, the faster the image forms. Monture azimutale : it moves in altitude and in rotation, but the field turns during the night. Monture équatoriale : one axis set on that of the Earth, so that the field no longer turns.

f/5,3 · Sony IMX585

Seestar S30 Pro

The S30 keeps its body, its weight and its 30 mm, and changes what is inside: a sensor four times larger, four lenses instead of three, and a rebuilt wide angle.

1h on l'Origin = 5h 48m here

Aperture
30 mm
Weight
1,65 kg
Indicative price
≈ 749 €

f/5,2 · OmniVision OS08B10

Seestar S50 Pro

The heaviest overhaul in the Seestar range. The dual-band and the equatorial mode were already there; what changes is the sensor, the optics, the battery and the price.

1h on l'Origin = 5h 35m here

Aperture
50 mm
Weight
2,8 kg (bloc principal)
Indicative price
≈ 999 € (≈ 899 € en offre de lancement jusqu'au 15/09/2026 à 9 h, heure d'été d'Europe centrale)

This equivalence says nothing about resolution, about the field or about optical quality: f/2,2 on 152 mm and f/5,3 on 30 mm do not photograph the same objects. Worked out from the published focal ratios alone, with sensor, sky and target held identical.

Images made with this brand

No images: no device tried

No device from this brand has been used to make one of my images. The space a gallery would take stays empty, and it says so: nothing is borrowed from a press release or from a stock library to fill it.

Following this brand

What is checked, and what is not

This page does not copy out a press release. Here is how it is made, and what it does not claim to know.

  • The specifications come from the manufacturer datasheets and from published reviews, listed on each product entry.
  • Prices are recorded in 2026, excluding promotions, and they move fast: they are indicative.
  • I have not tried any device from this brand. The notes on using it come from published sources, never from an invented personal experience.
  • The scale above measures the hours ofintegration (the total exposure time, the sum of every exposure stacked on an object) logged with these devices, from 0 to 165h across the whole catalogue. It is not a quality rating: an empty track is a device that was not tested, not a bad device.
  • The devices from this brand can be ordered from me, and I earn an income from them. No brand funds these pages. No link earns a commission. No manufacturer proofreads what I write here. That is why this page also publishes the weak points, and says which devices I have never tried.
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