Optics/Sensor
The SeeStar S30 Pro uses 30mm f/5.3 triplet refractor optics for a 160mm focal length. This is roughly equivalent to a typical finder scope, albeit with much nicer optics. There is little to no chromatic aberration from the SeeStar’s optics in its images.
The main camera of the SeeStar S30 Pro is a Sony IMX585 sensor. This is the same sensor used in the Vaonis Vespera II, which I’ve previously tested, and my Player One Uranus-C Pro camera that I use with other telescopes for astrophotography.
With 8-megapixel (3840 x 2160) resolution and 2.9-micron pixels, it delivers sampling of about 4 arc seconds per pixel and a field of view of 4 x 2.25 degrees. This is obviously pretty low resolution for smaller targets, but for nebulae, open star clusters, and larger galaxies, it’s fine. You can resolve most of the larger and brighter globular clusters with the S30 Pro, too. The huge field of view of the S30 Pro is enough to capture even the largest deep-sky objects, such as the Seagull Nebula in a single frame, and you can further extend it to capture multiple deep-sky objects at once, such as the Flame, M78, and Orion Nebula in a single image, or the entire Virgo Cluster, etc.
The S30 Pro also has a wide-angle lens coupled to a Sony IMX586 sensor, offering the same resolution as the main objective and a 63-degree field of view. This can be used to take photos of star trails, meteors, and—best of all—timelapses of the Milky Way and constellations moving across the sky. Doing timelapses in this manner with a regular DSLR/mirrorless camera requires a considerable amount of preparation and post-processing.
The SeeStar app automatically output the below timelapse for me, and a few minutes later I switched to imaging M8 and M20 with the main objective instead.
Due to the lack of active cooling on the sensor, the S30 Pro’s performance is affected significantly by the temperature at which it’s operating.
In Arizona, where I live, it can be quite warm in the evening in my backyard. My best images from dark sky sites are just as improved by the lower temperatures at higher altitudes as they are by the lack of light pollution. Fortunately, living in a desert means I can also stick the S30 Pro in my refrigerator before imaging without risking condensation when I take it out, which keeps the sensor cold for a few hours, avoiding the highest temperatures. I don’t do this on cooler nights or if I’m traveling.
The S30 Pro has a built-in IR cut filter by default, and the app allows you to toggle an additional dual-band nebula filter with the tap of a button. This filter significantly improves images of nebulae under all but the darkest skies.
Power, Storage, & Connection
All smart telescopes draw a lot of power, and the SeeStar S30 Pro is no exception. Considering it is effectively running a mini-PC with graphics processing to stack images in real time and broadcasting a WiFi network, the S30 Pro’s battery performance is downright impressive.
When fully charged, it’ll run for about 6-8 hours even with live stacking enabled, which is considerably better than competitors. I can run the scope all night off a smaller battery pack without draining the whole thing, but I usually run the S30 Pro off my EcoFlow River 3 since I can recharge it for free and out in the field with a solar panel.
The SeeStar S30 Pro uses a USB-C port to charge as well as for data transfer. Unfortunately, for whatever reason, ZWO ships the S30 Pro with the SD card formatted on Linux. My Windows PC does not recognize the S30 Pro and will not let me transfer files. Fortunately I have a MacBook Pro, so I can just upload the files to that and transfer them to my more powerful PC over the cloud, but this is a pain, and most people do not have the fortune to own multiple computers with different operating systems. I hope ZWO can solve this problem.
It’s worth noting that the S30 Pro is not able to store nearly as many images onboard as competitors. If you want to keep files on the scope to stack them in the SeeStar app, you will rapidly run out of space. The SeeStar S30 Pro’s massive 8-megapixel images mean it takes less of them to fill up storage than with the older S30 and S50 or competing telescopes.
Mount & Tracking
The SeeStar S30 Pro can be operated in both an alt-azimuth (up/down and left-right) and equatorially mounted configuration. For use in alt-azimuth mode, ZWO provides a small tripod that sits on the ground, or the scope can attach to any photo tripod with a ⅜-16” thread.
When in alt-azimuth mode, the S30 Pro uses software to compensate for the field rotation inherent in making uneven stair-step motions across the sky. However, there are limits to this—exposures over 30 seconds are disabled in alt-az mode, and exposures of 20-30 seconds have blurring at the edges, especially if the target is far from the celestial equator. Your target also won’t be framed the same the whole night, which can lead to some odd artifacts due to gradients if you use the stacked images output by the SeeStar app.
To use the S30 Pro in an equatorially mounted configuration, the scope needs a heavy-duty tripod with a wedge or head that has a ⅜-16” bolt on it.
Once the SeeStar and wedge/head are assembled, you simply tilt the head/wedge to aim the scope’s altitude axis towards Polaris. The SeeStar app will tell you how far off you are in elevation based on its internal gyroscope in real time for you to make adjustments.
After you narrow the elevation angle down, the S30 Pro will then take a series of short exposures through the scope and tell you how close you are to proper polar alignment as well as suggesting adjustments (usually just moving the wedge/tripod side-to-side). Within 5 degrees is considered acceptable, but for best results, I would aim to get within about 1 degree of Polaris. That being said, I have never gotten this feature working and have ended up just eyeballing polar alignment through a hole in the wedge. If this is still inaccurate, I can tell based on the direction any stars start to trail in long exposures what direction I need to adjust the wedge.
Once polar aligned, the S30 Pro can take individual exposures as long as 1 minute, without blurred edges or any strange gradient artifacts resulting from field rotation. However, the scope is more vulnerable to wind, and with the brightest targets, you may actually not want to use more than 20-30 second subs (e.g., globular clusters and the cores of bright nebulae/galaxies), as they can blow out from overexposure.
This all being said, the trailing when using alt-az mode and 20-30 second exposures is only bad when aimed far away from the celestial equator and not using mosaic mode.
If you are aiming near the celestial equator, the field rotation the S30 Pro experiences is a lot lower than closer to the poles (i.e., near Polaris). And a lot of the larger nebulae you probably will want to image in the sky are best with mosaic mode anyway; the overlapping frames of the SeeStar’s mosaic mode pretty much eliminate the star trails around the edges.
That being said, for longer integration times (above 2-3h), EQ mode is much better for consistent quality frames with minimal blurring wherever you are in the sky, and if you can use it, you should.
How I Set Up and Use the SeeStar S30 Pro with the SeeStar App
The ZWO SeeStar app is quick to set up, although it’s not without its quirks.
The app basically presents you with an ad to buy the SeeStar until you have paired your device with the telescope, after which you are free to peruse the telescope’s different imaging modes: imaging through the main camera in either astronomical or terrestrial mode, shooting time exposures with the wide-angle lens with tracking enabled (to take time-lapses of the Milky Way, etc.), and shooting time exposures with tracking disabled (for star trails above scenery).
Once the SeeStar S30 Pro is connected to your device, it can immediately start imaging if you’re in alt-az mode, or you can complete polar alignment first for EQ mode. The whole thing is very straightforward—there’s a sky atlas that shows the scope’s pointing and field of view on the sky with thousands of objects, as well as the field of view with the wide-angle lens. Anyone can use this. Exposure time, focus, and toggling the dual-band light pollution filter are all controlled at the tap of a button.
One weak point with the SeeStar app is that the sequencing/planning setup for taking multiple images autonomously doesn’t work very well. Neither I nor my friend with her S30 Pro could get it to let us adjust all the settings we wanted, nor adjust parameters once the automated sequence began, to adjust focus being off or otherwise change things.
Fortunately, you can also just connect the S30 Pro to the Internet or directly to a PC and control it with software like NINA, since it has ASCOM drivers. As for me, I just image one target until I go to sleep, then choose another that will still be above the horizon at dawn.
The S30 Pro also has some asteroids and comets programmed into its database, and you can download/add more yourself. Unfortunately, the app lacks a dedicated stacking mode for these objects, so for clear images of fast-moving targets you’ll need to process the individual FITS frames yourself with something like Siril’s comet mode.
The S30 Pro, by default, will “live stack” images in real time, giving you a stacked FITS image as output. Alternatively, you can have it just take individual frames and select/stack them later in the SeeStar app or on your PC. I leave live stacking on and save individual frames, since stacking can take quite a bit of time to do later.
The SeeStar app has the ability to select frames for deletion and then stack or re-stack whatever you choose to keep, but it’s exhausting scrolling through hundreds of images pixel-peeping manually.
For my image of Omega Centauri, there were so many blurry frames that I had to save them all to my PC and then reject the bad ones via Siril’s stacking. This took a while.
If your live stack doesn’t have any issues with star roundness or satellite/meteor trails, you can just go ahead and use the live stacked image. For slightly better image quality one should probably always stack the individual frames on a PC with Siril or PixInsight, but I am lazy and just use the live stacks most of the time if I can get away with it. For multiple nights I will combine the live stacks.
In addition to being able to do stacking on the SeeStar app, there is also an “AI denoise” feature and some other basic post-processing offered for you to use. I don’t personally find the AI denoise helpful, and I’ve never been particularly happy with the results from just using the in-app sliders, but it’s nice if you don’t have ready access to a computer.
After exporting individual frames or multiple nights of stacked images, I usually combine and process data from my S30 Pro within Siril. Post-processing is usually a sequence of background extraction & color balancing → RGB align → cropping → denoising → sharpening → more denoising → VeraLux stretch → color balancing again. To minimize artifacts, I usually stack with linear fit or winsorized sigma clipping.
Mosaic Mode
The S30 Pro has a mosaic mode, which works quite well, though I generally prefer to just stitch together multiple panels manually (such as for my photo of Antares/Rho Oph and the surrounding region). I used it to take this image of the Veil Nebula; it’s actually somewhat cropped from the original:
Advantages & Disadvantages of SeeStar S30 Pro vs a Traditional Star Tracker & Camera/Lens
Besides the Dwarf telescope models and the discontinued regular SeeStar S30/S50, the only other option for an astrophotography setup in the SeeStar S30 Pro’s price range is some variation on a DSLR or mirrorless camera with a lens and star tracker.
The S30 Pro and similar smart telescopes are much easier to set up, focus, and point at targets compared to a non-GoTo star tracker. Setting up one of these to take a time lapse during an observing session would be a downright distraction compared to hitting a few buttons in the SeeStar app to change it from deep-sky imaging to the wide-field mode, for instance.
Advantages of the SeeStar S30 Pro over a star tracker/lens
- Setup-to-imaging time is ~5-10 minutes. The S30 Pro is much quicker to put together and even polar align compared to a normal star tracker/DSLR setup, and you don’t have to look at the viewfinder or a screen while using it.
- The entire S30 Pro setup and mini tripod are about the size of a typical DSLR/lens by themselves, never mind a fluid head and/or tracker.
- Precise aiming and tracking are guaranteed, and autofocus usually works fairly well.
- The S30 Pro can switch between wide-angle mode and the main 30mm objective in seconds, mimicking the capabilities of both a telephoto and wide-angle lens without any of the hassle.
- Timelapses are automatically made for you instead of having to edit on a computer.
Disadvantages of S30 Pro vs. a star tracker/lens
- No upgrade path beyond EQ mode
- A DSLR/mirrorless and lens can be used handheld and is more suitable for daytime photography than the S30 Pro
- While the S30 Pro can take star trails, they’re not truly long exposures—just stacks of 1-minute frames. You might prefer the look of a single 30-minute frame with a DSLR
If you’re just getting into astrophotography, I think the S30 Pro is a much easier and less frustrating way to start than a traditional tracker/camera. The only circumstance in which I’d say otherwise is if you already own a bunch of camera gear and are familiar with how to use it.
Reliability & Software Updates (as of May 2026)
The SeeStar S30 Pro’s issues are, with one notable exception, confined to the SeeStar app itself. Sidestepping the app via direct control with NINA or similar software obviates them:
In terms of actual performance, here are some common issues I’ve encountered:
- Plate solving and auto-focusing are easily confused by trees or partial cloud cover
- Focusing can sometimes be inaccurate
- Framing can sometimes be slightly off
More concerning is the SeeStar app’s inability to reject frames with obvious artifacts, such as trails from satellites and meteors or less-than-round stars due to wind/tracking issues. I had to throw out more than half my frames of Omega Centauri, for instance. However, this is likely an issue that will get better over time.
Most seriously of all, however, is the aforementioned issue the S30 Pro seems to have with transferring data to a PC. Thankfully, I can get files to upload to my Mac via a USB-C cable just fine, but seemingly due to drive formatting issues, I have had no success getting my Windows 10 PC to recognize the S30 Pro when plugged in. Multiple friends with S30 Pros have had similar issues.
Should I buy a Used SeeStar S30 Pro?
The SeeStar S30 Pro was only released in late 2025, so used units aren’t super common—but there’s little that can go wrong with a used one, and ZWO will usually provide support. However, beware that the non-Pro older S30 (essentially the same hardware as Dwarf Mini) looks almost identical to the S30 Pro from the outside.
Aftermarket/Third-Party Accessory Recommendations
The standard USB-C charging port on the S30 Pro means you can power it with pretty much any power bank. I use an EcoFlow River 3 Plus. ZWO sells a wedge you can use in lieu of your own fluid/ball head to put the scope into equatorial mode, though if you already have a good fluid or ball head, you can just use that.
You can also add a dew shield/light shade for the S30 Pro to improve contrast and reduce glare. I sell these on my eBay store.
How the SeeStar S30 Pro compares to other smart telescopes
- The Dwarf Mini offers the SeeStar S30 Pro’s optics and similar image quality, along with the ability to take exposures twice as long as the maximum on the S30 (2-3 min vs. min). However, it has a greatly reduced field of view compared to the SeeStar S30 Pro, and the wide-angle lens is not as sharp or high-resolution.
- The Dwarf 3 has the same features as the Mini but with a different sensor and slightly more aperture. While offering higher resolution, it doesn’t have quite as high sensitivity to faint objects owing to its smaller pixels and lower quantum efficiency.
- The Vaonis Vespera II/III uses the same sensor as the SeeStar S30 Pro, but with a larger 50mm objective lens. However, it can’t be used in an equatorially mounted configuration, which limits exposures to just 20 seconds, and it doesn’t offer the wide-angle lens or terrestrial capabilities of the SeeStar S30 or Dwarf telescopes.
- ZWO plans to release an S50 Pro in late 2027, likely with the S30 Pro’s IMX585 sensor. This would basically offer the performance of Vespera II/III but with the design and functionality of the S30 Pro, including features like equatorial mode, which Vespera lacks.
What’s best to image with the SeeStar S30 Pro?
The S30 Pro can be used to image the Moon and Sun (the latter with the provided solar filter).
But it really shines on deep-sky objects. With an image scale of around 4 arcsec/pixel, it’s mostly intended for imaging nebulae, especially with the built-in dual band filter.
The darker the skies, the better the results you’ll get, regardless of the target. Darker skies with less light pollution mean less background noise, so you can get the same amount of detail on a target in a fraction of the time. It takes about ⅓ to ¼ of the exposure time on most objects to get the same level of detail from Bortle 1 skies as from my Bortle 5 house. Under worse conditions, the difference is even more stark.
Most of the time, I keep exposures with the SeeStar to 20-30 seconds regardless of whether I’m using alt-az or EQ mode. 1-minute exposures with the S30 Pro in EQ mode can reveal fainter details, but you’re more likely to have to discard frames due to tracking issues.
Over time, I’ve found myself using the wide-angle mode more and more to take photos of the landscape or time-lapses of myself and my friends at night. Compared to the effort of a DSLR, star tracker, and the usual editing sequence for the photos these produce, it’s quite easy to take wonderful nightscapes such as this one:
