ZWO SeeStar S50 Review: Smart Telescope for Easy Astrophotography

The market for “smartscopes” – small, robotic telescopes that automate astrophotography – continues to expand, offering an accessible entry point for those wanting to capture images of the night sky without the complexities of traditional telescopes, and cameras. The ZWO SeeStar S50 is a recent addition to this growing field, aiming to simplify deep-sky imaging for beginners and experienced stargazers alike. This compact, all-in-one telescope combines optics, a tracking mount, and a camera into a single, portable unit controlled via a smartphone app. But does it deliver on its promise of effortless astrophotography?

Design and Specifications

The ZWO SeeStar S50 is an apochromatic refractor telescope with a 50mm aperture and a focal length of 250mm, resulting in an f/5 focal ratio. It’s equipped with a 2.1-megapixel Sony IMX462 CMOS sensor, capturing images at a resolution of 1920 x 1080 pixels. The telescope boasts built-in Wi-Fi and Bluetooth connectivity, a rechargeable lithium battery offering 3.5 to 5 hours of runtime, and 64GB of internal memory for storing images. Weighing in at 5.51 lbs (2.5 kg) and measuring 5.6 x 5.1 x 10.1 inches, the SeeStar S50 is designed for portability.

Out of the box, the SeeStar comes with a carrying case, the telescope itself, a carbon fiber tabletop tripod, a USB charging cable, a solar filter, and a brief instruction pamphlet. The telescope’s design prioritizes ease of use, foregoing a traditional hand control in favor of complete app-based operation.

Setting Up and Using the SeeStar S50

Getting started with the SeeStar S50 involves downloading the dedicated app (available for both iOS and Android). The initial setup requires pairing the telescope with your smartphone via Bluetooth, after which it connects via Wi-Fi. The app guides users through the setup process, offering tutorials and step-by-step instructions. Unlike conventional telescopes that require manual alignment, the SeeStar S50 automatically aligns itself using a process called “plate solving,” comparing images of the star field to its internal database to determine its position.

Once aligned, users can select a target object from the app’s database or use the built-in star atlas to manually locate celestial objects. The telescope then automatically slews to the selected target and begins capturing images. The app allows users to adjust exposure settings and stack multiple short exposures to improve image quality. The live stacking feature is a key benefit, allowing users to see the image develop in real-time on their smartphone or tablet screen.

Performance and Image Quality

The SeeStar S50 excels at capturing images of brighter deep-sky objects like the Orion Nebula (M42) and the Andromeda Galaxy (M31). Even with relatively short exposures (10-20 seconds), the telescope can produce detailed images revealing intricate structures and colors. The built-in light pollution filter helps to mitigate the effects of artificial light, making it suitable for use in suburban areas. Live Science notes the telescope’s ability to produce impressive images with minimal effort, making astrophotography accessible to beginners.

However, the SeeStar S50’s performance is limited by its small aperture. Although it excels at capturing extended objects, it struggles to resolve fine details on planets and the moon. The telescope’s tracking accuracy can also be affected by wind and other environmental factors, particularly when using the included tabletop tripod. Switching to equatorial mode, which requires a separate equatorial wedge or a more robust tripod with a tiltable head, can significantly improve tracking performance and image quality. AstroBackyard explains that smart telescopes like the SeeStar S50 utilize electronically assisted astronomy (EAA) and live stacking to create images, even under light-polluted skies.

Software and Updates

The SeeStar app is central to the telescope’s operation, providing a user-friendly interface for controlling the telescope, selecting targets, and capturing images. The app includes a comprehensive star atlas and tutorials to guide users through the process. However, frequent app updates, while intended to improve functionality, can sometimes introduce bugs or require users to relearn the interface. This has been a recurring criticism from users, highlighting the need for more stable and consistent software.

Is the ZWO SeeStar S50 Right for You?

The ZWO SeeStar S50 is an excellent choice for beginners interested in astrophotography or for experienced stargazers looking for a portable and easy-to-use imaging solution. Its automated alignment, intuitive app, and impressive image quality craft it a compelling option. However, its limited aperture and occasional software quirks may not appeal to those seeking the highest levels of detail or a more traditional observing experience. It’s particularly well-suited for capturing wide-field images of nebulae and galaxies from light-polluted locations. The upcoming total solar eclipse on August 12, 2026, presents another opportunity to utilize the SeeStar S50, especially with the included solar filter for safe solar imaging.

If planetary imaging is your primary interest, a traditional telescope with a larger aperture would be a better investment. For those seeking a more advanced smart telescope experience, options like the Vaonis Vespera II offer higher performance and more features, but at a significantly higher price point. NASA Space News highlights the evolution of autonomous digital astronomy and the benefits of modern sensor technology in smart telescopes.

the ZWO SeeStar S50 strikes a compelling balance between affordability, portability, and performance, making it a standout contender in the rapidly evolving world of smart telescopes.