Head-to-head · updated November 9, 2026
ZWO Seestar S30 Pro vs ZWO Seestar S50
Short answer: choose the S30 Pro ($699, in stock) if you want 4K images, a wide-angle camera, a big 4.6° field for large nebulae and the lighter body. Choose the S50 ($549) if aperture matters more to you: 50 mm against 30 mm, for smaller galaxies and a bit more detail on the Moon and planets. On November 9, 2026, the S50 was sold out on ZWO's US store.
ZWO Seestar S30 Pro
8.5Very good · out of 10- 4K telephoto with a 1/1.2-inch Sony IMX585 sensor, plus a 4K wide-angle camera with a 63° field
- 4-element apochromatic lens with ED glass and active anti-dew control
- 128 GB of storage and a 1.65 kg body
Better on 5 of 16 lines · $699 on November 9, 2026
ZWO Seestar S50
8.6Very good · out of 10- 50 mm apochromatic triplet with ED glass and a 250 mm focal length, according to ZWO
- Duo-band light pollution filter built in, switched from the app
- Alt-azimuth mount that also supports Equatorial Mode
Better on 5 of 16 lines · $549 on November 9, 2026
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Spec by spec
| Criterion | Seestar S30 Pro | Seestar S50 |
|---|---|---|
| Calculated score | 8.5/10 | 8.6/10 |
| Checked price | $699 | $549 |
| Aperture | 30 mm | 50 mm |
| Focal length | 160 mm (f/5.3) | 250 mm (f/5) |
| Main sensor | Sony IMX585 (1/1.2") | Sony IMX462 (1/2.8") |
| Native resolution | 8.3 MP | 2.1 MP |
| Image scale | 3.76″ per pixel | 2.42″ per pixel |
| Field of view | 4.6° (telephoto) | 0.73° × 1.29° |
| Wide-angle camera | Yes | No |
| Light pollution filter | Built in | Built in |
| Equatorial mode | Yes | Yes |
| Weight | 1.65 kg (3.6 lb) | 2.5 kg (5.5 lb) |
| Storage | 128 GB | 64 GB |
| Eyepiece | No | No |
| Focus | Autofocus | Autofocus |
| Warranty | 2 years | 2 years |
★ marks the better figure on that line (10 lines can be compared). Specs as published by the makers; prices checked on November 9, 2026.
What the numbers mean
These two sit at the heart of ZWO's range and they pull in different directions. The S50 is the older design with the bigger lens (50 mm, 250 mm focal length) and a 1080 × 1920 sensor. The S30 Pro pairs a smaller 30 mm, 160 mm lens with a much better camera: a Sony IMX585 at 4K, plus a 63° wide-angle camera for the Milky Way.
Put simply, the S50 sees deeper and tighter, the S30 Pro sees wider and sharper per frame. If you like the Orion Nebula, the Heart and Soul or the Veil, the S30 Pro's field is a gift. If you want M51, M81 or the Ring Nebula to look like more than a smudge, aperture wins.
Our pick for each kind of buyer
ZWO Seestar S50
Seestar S50 costs $150 less than the Seestar S30 Pro, at prices checked on November 9, 2026.
Read the review →ZWO Seestar S50
Seestar S50 scores 8.6/10 against 8.5/10 with our published formula.
Read the review →ZWO Seestar S50
Seestar S50 has 50 mm of aperture against 30 mm and an image scale of 2.42″ per pixel against 3.76″: smaller numbers mean more detail on Jupiter and Saturn.
Read the review →ZWO Seestar S30 Pro
Seestar S30 Pro weighs 1.65 kg (3.6 lb) against 2.5 kg for the Seestar S50, tripod excluded.
Read the review →ZWO Seestar S30 Pro
Seestar S30 Pro adds a second wide-angle camera; the Seestar S50 only has its telescope camera.
Read the review →Questions
Which is better, the Seestar S30 Pro or the Seestar S50?
With our published overall formula, the Seestar S50 scores higher (8.6 vs 8.5/10). The best pick still depends on what you observe: see the picks by profile on this page.
What is the price difference between the Seestar S30 Pro and the Seestar S50?
On November 9, 2026, the Seestar S30 Pro was $699 at the Seestar US store and the Seestar S50 $549 at the Seestar US store. The Seestar S50 was shown as sold out there.
Which has more aperture?
The Seestar S50 has 50 mm against 30 mm, so it collects about 2.8 times more light.
Which one is lighter?
The Seestar S30 Pro: 1.65 kg against 2.5 kg, tripod excluded, as stated by the makers.