Comparison
Seestar S30 Pro vs S50 Pro (and the Original S30 and S50)
ZWO's two Pro models share the same 4K telephoto and wide-angle cameras. The difference is aperture, focal length, field of view, battery and weight. Which to buy, and how both compare with the original S30 and S50.
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Our pick
Seestar
Seestar S50 Pro
8.0/10 research score50 mm at 260 mm, a near-zero-backlash drive and a 10,000 mAh battery, for $999.
Seestar
Seestar S30 Pro
7.7/10 research score30 mm at 160 mm with a 4.6° field, in a 3.6 lb body, for $699.
Seestar
Seestar S50
7.3/10 research scoreThe discontinued original: 50 mm, 1080p sensor, no wide camera.
The short answer
Choose the S50 Pro ($999) for more light (2.8 times the S30 Pro's), a longer 260 mm focal length for small galaxies and the Moon, and a 9-hour battery rating. Choose the S30 Pro ($699) for travel, big nebulae and a wider 4.6° field at 3.6 lb. The originals are sold out; buy them used only if the price is right.
Both Seestar Pro models have the same 4K telephoto and wide-angle cameras, 4-element apochromatic lenses, built-in filters, 128 GB storage and EQ mode. ZWO's own comparison says they serve "different astrophotography priorities rather than represent a simple base-to-upgrade product pair". The differences come down to aperture, focal length, battery and weight. We compared ZWO's specs with hands-on reviews; we have not tested them ourselves. See how we research.
Specs side by side
| Spec | S30 Pro | S50 Pro | S30 (original) | S50 (original) |
|---|---|---|---|---|
| Aperture / focal length | 30 / 160 mm | 50 / 260 mm | 30 / 150 mm | 50 / 250 mm |
| Telephoto sensor | 1/1.2" 8.3 MP (IMX585) | 1/1.2" 8.3 MP (OS08B10) | 1/2.8" 2 MP (IMX662) | 1/2.8" 2 MP (IMX462) |
| Telephoto field | 4.6° | 2.8° | 2.46° | 1.46° (ZWO) |
| Wide-angle camera | 4K, 63° | 4K, 63° | 1080p, 23.2° | None |
| Lens | 4-element APO | 4-element APO | 3-element APO | 3-element APO |
| Battery (ZWO lab) | 6,000 mAh, about 6 h | 10,000 mAh, up to 9 h | 6,000 mAh, about 6 h | 6,000 mAh, about 6 h |
| Storage | 128 GB | 128 GB | 64 GB | 64 GB |
| Weight | 1.65 kg (3.6 lb) | 2.8 kg (6.2 lb) | 1.65 kg (3.6 lb) | 2.5 kg (5.5 lb) |
| Price | $699 | $999 | $399 (sold out) | $499 (discontinued) |
From ZWO's product pages and comparison articles, checked October 17–18, 2026. All four include a magnetic solar filter, duo-band and dark filters, and support EQ mode on a tilting head.
Light and detail
The S50 Pro's 50 mm lens collects about 2.78 times the light of the S30 Pro's 30 mm, according to ZWO, and its 260 mm focal length makes small targets larger in the frame. AstroBackyard calls the S50 Pro "the performance choice" for compact targets and lunar detail. Digital Camera World notes the S50 Pro still has "not enough focal length for planets".
Field of view
The S30 Pro's 4.6° telephoto field is about 1.6 times wider than the S50 Pro's 2.8°. ZWO says that makes the S30 Pro better for framing the Orion Nebula, Rosette Nebula and Andromeda Galaxy with their surroundings, without mosaics. AstroBackyard agrees the S30 Pro "remains better for large nebulae and travel". Both can stitch mosaics for bigger targets.
Battery, tracking and weight
The S50 Pro's 10,000 mAh battery is rated for up to 9 hours against the S30 Pro's 6, and Digital Camera World's unit lasted over six hours without running out. ZWO says the S50 Pro also has a "near-zero-backlash" precision drive for steadier tracking in EQ mode. The trade-off is weight: 2.8 kg against 1.65 kg. ZWO says the S30 Pro fits "into a standard backpack or camera bag"; Digital Camera World found the S50 Pro less camera-bag friendly.
What about the original S30 and S50?
Both were sold out at ZWO in October 2026, and ZWO has discontinued the S50. Their 1080p sensors give much smaller images than either Pro, and the S50 has no wide-angle camera. AstroBackyard calls the S50 "the value pick" if you find one cheaply; check that a used unit is the international version.
Which should you buy?
- S50 Pro if you want the most detail on galaxies, clusters and the Moon, run long or scheduled sessions, and don't mind 6.2 lb. Read the review.
- S30 Pro if you travel, hike or fly with your scope, mostly image large nebulae, or want to save $300. Read the review.
For other options, see Seestar vs DWARF 3 and the best smart telescopes.
| Spec | Seestar Seestar S50 Pro | Seestar Seestar S30 Pro | Seestar Seestar S50 | Seestar Seestar S30 |
|---|---|---|---|---|
| Research score | 8.0/10 research score | 7.7/10 research score | 7.3/10 research score | 7.2/10 research score |
| List price | $999 | $699 | $499 | $399 |
| Optics | ||||
| Aperture | 50 mm (best) | 30 mm | 50 mm (best) | 30 mm |
| Focal length | 260 mm (best) | 160 mm | 250 mm | 150 mm |
| Focal ratio | f/5.2 | f/5.3 | f/5 (best) | f/5 (best) |
| Optics | 4-element apochromatic lens with ED glass | 4-element apochromatic lens with ED glass | 3-element apochromatic lens with ED glass | 3-element apochromatic lens with ED glass |
| Field of view | 2.8° (telephoto), 63° (wide-angle) | 4.6° (telephoto), 63° (wide-angle) | 0.73° × 1.29° | 2.46° (telephoto), 23.2° (wide-angle) |
| Camera | ||||
| Image sensor | OmniVision OS08B10, 1/1.2 in | Sony IMX585 | Sony IMX462 | Sony IMX662 |
| Sensor resolution | 8.3 MP (best) | 8.3 MP (best) | 2.1 MP | 2.1 MP |
| Pixel size | 2.9 µm | Not published | Not published | Not published |
| Wide-angle camera | Yes | Yes | No | Yes |
| RAW / FITS files | Yes | Yes | Yes | Yes |
| Filters and imaging | ||||
| Light-pollution filter | Yes | Yes | Yes | Yes |
| Built-in filters | UV/IR-cut, duo-band (OIII 30 nm / Hα 20 nm, telephoto only), dark-frame | UV/IR-cut, duo-band (OIII/Hα), dark-frame | UV/IR-cut, duo-band (OIII/Hα), dark-frame | UV/IR-cut, duo-band (OIII/Hα), dark-frame |
| Solar filter included | Yes | Yes | Yes | Yes |
| Longest single exposure | 60 s | 60 s | Not published | Not published |
| Mount and tracking | ||||
| Equatorial mode | Yes | Yes | Yes | Yes |
| Autofocus | Yes | Yes | Yes | Yes |
| Dew heater | Yes | Yes | Yes | Not published |
| Eyepiece | No | No | No | No |
| Power and storage | ||||
| Battery life | 9 h (best) | 6 h | 6 h | 6 h |
| Battery capacity | 10,000 mAh (best) | 6,000 mAh | 6,000 mAh | 6,000 mAh |
| Built-in storage | 128 GB (best) | 128 GB (best) | 64 GB | 64 GB |
| Connectivity | Wi-Fi 2.4/5 GHz (up to 10 m), Bluetooth (up to 5 m), NFC, USB-C | Wi-Fi 2.4/5 GHz (up to 10 m), Bluetooth (up to 5 m), USB-C | Wi-Fi 2.4/5 GHz (up to 10 m), Bluetooth (up to 5 m), USB-C | Wi-Fi 2.4/5 GHz (up to 10 m), Bluetooth (up to 5 m), USB-C |
| Size and warranty | ||||
| Weight | 6.17 lb | 3.64 lb (best) | 5.51 lb | 3.64 lb (best) |
| Dimensions | 140 × 149 × 268 mm (folded) | 210 × 140 × 80 mm | 142.5 × 130 × 257 mm | 210 × 140 × 80 mm |
| Operating temperature | -10 °C to 40 °C (recommended) | -10 °C to 40 °C (recommended) | 0 °C to 40 °C (recommended) | -10 °C to 40 °C (recommended) |
| Warranty | 2 years | 2 years | 2 years | 2 years |
| Where to buy | Check price at Seestar (opens in a new tab) | Check price at Seestar (opens in a new tab) | Check stock at Seestar (opens in a new tab) | Check stock at Seestar (opens in a new tab) |
Frequently asked questions
Is the S50 Pro better than the S30 Pro?
Do the S30 Pro and S50 Pro have the same sensor?
Should I upgrade from the S50 to the S50 Pro?
Sources
Specs, prices and claims in this article come from these sources.
- Seestar S30 Pro vs S50 Pro: which Pro model is right for you? · ZWO Seestar · accessed Oct 18, 2026
- Seestar S50 vs S50 Pro · ZWO Seestar · accessed Oct 18, 2026
- Seestar S30 Pro specifications · ZWO Seestar · accessed Oct 17, 2026
- Seestar S50 Pro specifications · ZWO Seestar · accessed Oct 17, 2026
- Seestar S50 Pro review (S50 Pro vs S50 vs S30 Pro) · AstroBackyard · accessed Oct 18, 2026
- ZWO Seestar S50 Pro review · Digital Camera World · accessed Oct 18, 2026
Written by
SmartTelescopes editorial team
Research and editing
The SmartTelescopes editorial team researches smart telescopes from manufacturer documents, published measurements and owner reports.
