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Designed for astronomy enthusiasts, astrophotographers and travelling observers, it captures deep-sky objects, Milky Way panoramas and Sun and Moon detail without mounts, cables or extra accessories.
At the optical heart of the Seestar S50 Pro is a 4-element apochromatic (APO) lens with Extra-low Dispersion (ED) glass, engineered to eliminate chromatic aberration and deliver sharp, round stars all the way to the edge of the field. The 50mm aperture gathers nearly three times more light than the previous 30mm model, significantly improving results on faint deep-sky targets and on fine Sun and Moon detail.
The optical system offers a dual configuration: a 260mm focal length at f/5.2 for the telephoto lens (880mm equivalent) and a 6mm focal length at f/1.75 for the wide-angle lens (35mm equivalent), for maximum versatility between close-up capture and wide panoramas.
The telescope integrates two CMOS sensors, each with 8.3 megapixels and 4K UHD resolution. The 1/1.2" telephoto sensor (2.9μm pixels) is optimised for galaxies, nebulae and star clusters with a 2.8° field of view; the 1/2" wide-angle sensor (1.6μm pixels) covers a 63° field, ideal for the Milky Way, star trails and night landscapes. Supported formats: JPEG and FITS for images, MP4 and AVI for video.
The S50 Pro includes a UV/IR-cut filter on both optics, a dual-band light pollution filter (OIII 30nm / Hα 20nm, telephoto only) and a dark frame filter for noise subtraction on long exposures. A magnetic solar filter is also included for safe solar observation.
Four modes cover every observing scenario: Deep Sky with automatic tracking and stacking, Milky Way with mosaic and stitching up to 8K, Solar System for the Sun, Moon and planets, and Landscape for day and night shots. The telephoto DSO mosaic function widens the framed field while preserving detail, with output up to 8K for deep-sky targets and lunar surfaces.
A database of over 80,000 deep-sky objects and hundreds of thousands of stars enables one-tap GOTO from the app. AI noise reduction, automatic star removal and extraction, cropping, and brightness, contrast and saturation adjustments deliver professional results with one tap, or full manual control when you want it. Intelligent constellation recognition and the AI voice assistant also guide less experienced users in discovering the sky.
The foreground freeze function detects and locks the foreground landscape, processing it separately from the moving night sky, for crisp astro-landscape shots both in the sky and on the ground. Long-exposure star trail sequences can be automatically turned into dynamic time-lapse videos of the moving sky.
The Seestar S50 Pro is fitted with a near-zero backlash precision drive system that, combined with Equatorial Mode, offsets Earth's rotation for smoother, more stable tracking, enabling longer exposures with targets staying "still" in frame. The new upgraded tripod offers more shooting angles and more balanced three-point support for maximum stability.
With Plan Mode, you can generate a shooting plan with one tap and let the telescope run unattended all night, automatically switching between targets to capture more celestial objects in sequence.
The 10,000mAh battery delivers up to 9 hours of runtime (ZWO lab test data), ideal for extended sessions while camping or observing away from home. The 128GB eMMC internal memory (around 100GB usable) removes the need for external memory cards. Charging is via USB-C (5V/3A or 12V/3A).
Control is via the Seestar app for iOS and Android, with dual-band 2.4/5GHz Wi-Fi (up to 10m range), Bluetooth (up to 5m) and NFC for quick pairing. Remote control via Seestar Network lets you observe from anywhere by connecting to a device in a location with better sky conditions. For advanced users, the S50 Pro supports the open ASCOM Alpaca protocol and integrates with third-party software such as N.I.N.A., opening the door to automated observation workflows.
| Model | Seestar S50 Pro |
| Sensor | Tele: 1/1.2" 8.3MP (2.9μm) · Wide: 1/2" 8.3MP (1.6μm) |
| Resolution | Tele and Wide: 3840 × 2160 (4K UHD, 8.3MP) |
| Field of View | Tele: 2.8° · Wide: 63° |
| Aperture | Tele: 50mm · Wide: 3.4mm |
| Focal Ratio | Tele: f/5.2 · Wide: f/1.75 |
| Focal Length | Tele: 260mm · Wide: 6mm |
| Equivalent Focal Length | Tele: 880mm · Wide: 35mm |
| Working Distance | Tele: 15m–∞ · Wide: 0.1m–∞ |
| Optical Design | 4-Element Apochromatic (APO) Lens, ED Glass |
| Built-in Filters | UV/IR-cut (tele+wide) · Dual-band OIII 30nm/Hα 20nm (tele) · Dark frame (tele) |
| External Filter | Magnetic Solar Filter (included) |
| Internal Storage | 128GB eMMC (~100GB usable) |
| Battery | 10,000mAh, up to 9h runtime |
| Power Input | USB-C, 5V⎓3A / 12V⎓3A |
| Connectivity | Wi-Fi 2.4/5GHz, Bluetooth, USB-C, NFC |
| Formats | Images: JPEG, FITS · Video: MP4, AVI |
| Mount | Alt-Azimuth, with Equatorial Mode |
| Slew Rate | 1× – 1440× |
| Base Mount | 3/8"-16 |
| Operating Temperature | -10°C ~ 40°C |
| Weight | 2.8kg (main unit) |
| Dimensions | 140 × 149 × 268mm (folded) |
