Head-to-head · updated November 9, 2026
ZWO Seestar S50 Pro vs ZWO Seestar S30 Pro
Short answer: the S50 Pro ($999) for galaxies, planets and the longest battery claim (9 hours); the S30 Pro ($699) for wide nebulae, travel and the $300 saving. Both have two 4K cameras and a built-in dual-band filter.
ZWO Seestar S50 Pro
8.8Very good · out of 10- Two 4K cameras: a 50 mm telephoto with a 1/1.2-inch sensor and a 63° wide-angle camera
- Up to 9 hours on its 10,000 mAh battery, by ZWO laboratory figures
- Equatorial Mode with 60-second exposures, plus ASCOM Alpaca support for N.I.N.A.
Better on 4 of 19 lines · $999 on November 9, 2026
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 3 of 19 lines · $699 on November 9, 2026
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Spec by spec
| Criterion | Seestar S50 Pro | Seestar S30 Pro |
|---|---|---|
| Calculated score | 8.8/10 | 8.5/10 |
| Checked price | $999 | $699 |
| Aperture | 50 mm | 30 mm |
| Focal length | 260 mm (f/5.2) | 160 mm (f/5.3) |
| Main sensor | OmniVision OS08B10 (1/1.2") | Sony IMX585 (1/1.2") |
| Native resolution | 8.3 MP | 8.3 MP |
| Image scale | 2.3″ per pixel | 3.76″ per pixel |
| Field of view | 2.8° (telephoto, portrait) | 4.6° (telephoto) |
| Wide-angle camera | Yes | Yes |
| Light pollution filter | Built in | Built in |
| Equatorial mode | Yes | Yes |
| Longest exposure stated | 60 s | Not stated |
| Battery life | 9 h | Not stated |
| Weight | 2.8 kg (6.2 lb) | 1.65 kg (3.6 lb) |
| Storage | 128 GB | 128 GB |
| Eyepiece | No | No |
| Focus | Autofocus | Autofocus |
| Tripod in the box | Yes | Not stated |
| Warranty | 2 years | 2 years |
★ marks the better figure on that line (7 lines can be compared). Specs as published by the makers; prices checked on November 9, 2026.
What the numbers mean
The camera pair is close: a 1/1.2-inch telephoto sensor at 8.3 MP and a 63° wide camera on both. The S50 Pro puts it behind a 50 mm f/5.2 lens (260 mm), the S30 Pro behind a 30 mm f/5.3 lens (160 mm). So the S50 Pro collects about 2.8 times more light and frames tighter (2.8° against 4.6°).
The S50 Pro also brings a 10,000 mAh battery with a stated 9 hours, a tripod in the box and 60 s exposures in Equatorial Mode. The S30 Pro is 1.15 kg lighter and its wide field forgives imperfect tracking.
Our pick for each kind of buyer
ZWO Seestar S30 Pro
Seestar S30 Pro costs $300 less than the Seestar S50 Pro, at prices checked on November 9, 2026.
Read the review →ZWO Seestar S50 Pro
Seestar S50 Pro scores 8.8/10 against 8.5/10 with our published formula.
Read the review →ZWO Seestar S50 Pro
Seestar S50 Pro has 50 mm of aperture against 30 mm and an image scale of 2.3″ 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 2.8 kg for the Seestar S50 Pro, tripod excluded.
Read the review →Questions
Which is better, the Seestar S50 Pro or the Seestar S30 Pro?
With our published overall formula, the Seestar S50 Pro scores higher (8.8 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 S50 Pro and the Seestar S30 Pro?
On November 9, 2026, the Seestar S50 Pro was $999 at the Seestar US store and the Seestar S30 Pro $699 at the Seestar US store.
Which has more aperture?
The Seestar S50 Pro 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 2.8 kg, tripod excluded, as stated by the makers.