Seestar S30 Plus Smart Telescope

An All-in-One 1.65 kg Smart Telescope

Traditional astrophotography requires a telescope, an equatorial mount, a dedicated astronomy camera and more, with complex wiring and setup. The Seestar S30 Plus integrates the core imaging system into one lightweight device: optics, two cameras, a motorized mount, built-in filters, dew control, battery, storage and controller. Simply mount it on a tripod, power it on and connect to the Seestar app to start imaging.

This all-in-one design suits a first smart telescope, families looking for a shared evening activity, and travelers heading to dark-sky sites. From backyard stargazing to camping trips and family outings, it fits in a backpack with its protective case and mini tripod.

• Who it is for: beginners, families, schools, travelers and anyone who wants real astrophotography without assembling a rig.
• Where it works: urban balconies and rooftops, backyards, campsites and dark-sky trips.
• How it is controlled: the Seestar app on your phone or tablet, over Wi-Fi and Bluetooth.

2K Dual-Lens Imaging: Telephoto and Wide-Angle

The S30 Plus carries two cameras, each with an approximately 3.68 MP sensor recording 1440 x 2560 images at 1x zoom. The telephoto camera (30mm aperture, 160mm focal length, 1/1.8 inch sensor) gives a 3° field of view for nebulae, galaxies, star clusters, the Moon and the Sun. The wide-angle camera (6mm, f/1.75, 1/2 inch sensor) gives a 43.5° cropped field for constellations, the Milky Way and nightscapes.

The two cameras are used separately; simultaneous capture with both is not supported. Live preview from both cameras streams to your phone at 1080p, and resolution is reduced when you use 2x or 4x zoom. Switching between the telephoto and the wide-angle view takes a tap in the app, with no hardware to change.

• Telephoto: 30mm, 160mm, f/5.3, 3° field, working distance 6 m to infinity.
• Wide-angle: 3.4mm, 6mm, f/1.75, 43.5° field (cropped), working distance 0.1 m to infinity.
• Equivalent focal length (35mm format): about 815mm telephoto and 55mm wide-angle.

4-Element APO Optics, Triple Filters and Active Anti-Dew

At the heart of the S30 Plus is a 4-element apochromatic optical system with ED glass, designed to control chromatic aberration for sharp, well-defined stars with natural color. A folded optical path fits the 160mm focal length into a compact 210 x 140 x 80 mm body. Active anti-dew control heats the optics to keep condensation away on humid nights.

A triple filter system is built in and switched from the app, so there is nothing to attach or swap in the dark:

• UV/IR-cut filter: on both the telephoto and wide-angle cameras, blocking ultraviolet and infrared light for cleaner images and natural color.
• Dual-band light pollution filter: on the telephoto camera, passing O III (30 nm) and H-alpha (20 nm) to raise the contrast of emission nebulae under city skies.
• Dark filter: on the telephoto camera, used for dark-frame calibration to reduce sensor noise.
• Magnetic solar filter (included, external): attaches to the front for the Sun. A solar filter must be installed when observing the Sun. Never point the main camera directly at the Sun without it, as this will damage the device.

Imaging from the City with the Dual-Band Filter

The built-in dual-band light pollution filter reduces interference from city lights. It passes the H-alpha (20 nm) and O III (30 nm) light that emission nebulae give off, and cuts much of the broad glow from streetlights, so you can image the night sky right from your balcony or backyard.

Bright emission nebulae such as the Orion Nebula (M42) suit urban skies well, and the Moon and the Sun (with the solar filter) are easy targets anywhere. The Seestar app stacks frames live, so the image on your screen grows cleaner and more detailed as exposure time builds. Galaxies and other faint broadband targets still benefit from darker skies.

GoTo, 80,000+ Objects and Three Simple Steps

The Seestar app holds more than 80,000 deep-sky objects and 600,000 stars. Select a target and tap GoTo: the S30 Plus automatically finds it, centers it, tracks it and stacks the frames, revealing more detail as they add up. The app also recommends celestial objects for the night.

Getting started takes three simple steps: mount the S30 Plus on its tripod, power it on, and connect with the Seestar app. Automatic compass calibration, auto homing, automatic centering and tracking take care of the rest. The slew rate adjusts automatically from 1x (the sidereal rate, about 15 arcseconds per second, used for tracking) up to 1440x (about 6° per second, used for GoTo).

• NFC pairing: tap an NFC-enabled phone on the S30 Plus to connect. NFC reading works only on certain newer iPhone models, and Android support varies by manufacturer, so check your phone first.
• Before tapping: power on the device, unlock your phone and enable Wi-Fi, Bluetooth, NFC and GPS. If the Wi-Fi name has been changed, update the NFC information with your phone.

Four Imaging Modes for Sky and Scenery

From deep-sky wonders to everyday moments, four imaging modes cover both the night sky and daytime subjects:

• Stargazing Mode: nebulae, star clusters and galaxies, with GoTo, tracking and live stacking.
• Milky-way Mode: the Milky Way and star trails with the wide-angle camera.
• Solar System Mode: the Sun (only with the solar filter installed), the Moon and the planets.
• Scenery Mode: birds and landscapes, as a long telephoto camera by day.

Moving from one mode to another happens in the app, so the same compact device can photograph a nebula at night and a distant bird the next morning.

Milky Way, Star Trails, Time-Lapse and Landscape Freeze

The wide-angle camera lets you frame the Milky Way, trace the paths of the stars and turn a night beneath the sky into a time-lapse, each with one tap. Star trail images can be turned automatically into videos, so you can watch the trails extend and converge as the sky turns. Milky Way photography needs a dark sky; it is much less visible under heavy light pollution, and results depend on local conditions.

Landscape Freeze intelligently detects and locks the foreground landscape, processing it separately from the sky. You can set how long the landscape freeze lasts. Stars stay sharp during tracking while the foreground stays clear and natural, for crisp nightscapes.

Constellation Recognition and Mosaic Stitching

Constellation Recognition identifies constellation lines and labels with one tap. You can then use GoTo to lock on to a target quickly, so even beginners can find and recognize constellations with ease.

Some celestial objects deserve a wider view than one frame. With mosaic stitching on the telephoto camera, the S30 Plus captures overlapping images across the area you choose and stitches them together automatically, bringing more of the sky into one image. The S30 Plus does not support wide-angle mosaic stitching, so Milky Way panorama stitching and the one-tap Milky Way arch are not available on this model.

Equatorial Mode and 60-Second Exposures

The S30 Plus works as an alt-azimuth mount out of the box, and it also supports Equatorial Mode. In Equatorial Mode it compensates for Earth's rotation while tracking, so objects stay steady in the frame and longer exposures become possible.

60 s exposures are supported only in Equatorial Mode, not in Alt-Azimuth Mode. They need high tracking accuracy, which in turn needs very precise polar alignment; inaccurate alignment may reduce imaging efficiency. Equatorial Mode uses a tilting tripod head, sold separately, together with a sturdier tripod than the included mini tripod; ZWO pairs the S30 Plus with its Seestar TH10 tripod head and TC20 tripod.

Plan Mode, Remote Control and the AstroImg Community

Create an imaging plan and let the S30 Plus follow it through the night. It moves from one target to the next automatically, capturing several objects while you sleep. If the weather changes during a plan (cloud, rain or strong wind), the plan cannot be completed and the device does not shut down automatically, so check the forecast before you set it up.

Cloudy at home? Remote Control lets you connect to a Seestar at a remote location and explore the sky from wherever you are, capturing images and managing files through the app. You can then share your results in the AstroImg community, with astrophotographers in more than 100 countries.

One-Tap Post-Processing in the Seestar App

Bring out the detail in your images with one-tap enhancement, or take control with tools for star removal, star reduction, noise reduction, brightness, contrast, saturation, cropping, flipping and more, all on your phone. Results can be shared right from the app.

Smart Noise Reduction reduces noise and refines the appearance of stars in your real astrophotography images. It enhances existing images and does not create AI-generated images: everything the S30 Plus captures is a real photograph.

Battery, Storage, Connectivity and Operating Range

An internal 6000 mAh battery charges through USB Type-C (DC 5V, 3A max). In ZWO laboratory tests at 25°C it lasted about 6 hours in Stargazing Mode (image enhancement and tracking on, anti-dew off) and about 4 hours of MP4 video recording in Scenery Mode. Frequent operation and keeping a phone connected all the time shorten it, and actual battery life may vary.

The 64 GB of internal storage leaves about 45 GB for your files. Images are saved as JPEG or FITS, and video as MP4 or AVI.

• Connectivity: Wi-Fi (5 GHz / 2.4 GHz), Bluetooth, USB Type-C, NFC pairing and a Wi-Fi reset button.
• Operating temperature: -10°C to 40°C; charging 0°C to 40°C; operating humidity 20% to 80%.
• Size and weight: 210 x 140 x 80 mm, 1.65 kg without tripod.

Seestar S30 Plus vs. S30 and S30 Pro

The S30 Plus sits between the S30 and the S30 Pro in the Seestar 30mm lineup. All three share a 6000 mAh battery rated for about 6 hours.

• What the S30 Plus adds over the S30: a 4-element apochromat (vs. 3-element) at 160mm (vs. 150mm), larger 3.68 MP sensors in 1440 x 2560 (vs. 2 MP, 1080 x 1920), a 3° telephoto field (vs. 2.46°), a 43.5° wide-angle field (vs. 23.2°), NFC pairing and wide-field imaging.
• What only the S30 Pro offers: 8.3 MP sensors (2160 x 3840) with a 4.6° telephoto and 63° wide-angle field, 128 GB storage, wide-field mosaic, one-tap Milky Way arch, simultaneous dual-camera capture and comet stacking.

If you want a capable first smart telescope with 2K images, Milky Way and star trail modes and city-friendly filters, the S30 Plus fits. If you want the largest images and the full wide-field toolkit, the S30 Pro is the step up.