Smart Telescopes Compared: Seestar, Dwarf 3, Vespera, Odyssey, Origin

A smart telescope is a small motorized telescope with a built-in camera that finds a target, stacks exposures and shows the picture on your phone. The Seestar S30 and Dwarf 3 are the lightest, the Seestar S50 and Vespera II sit in the middle, and the Unistellar Odyssey and Celestron Origin carry far larger optics.

Smart telescope specs compared

Five of the six columns use the maker’s own specification page. Dwarflab’s site could not be opened when this page was written, so the Dwarf 3 column uses the figures printed in the BBC Sky at Night Magazine and Astronomy magazine reviews.

Two notes on reading it. ZWO gives one angle for each S30 camera instead of a width and height. Unistellar lists a pixel size (1.45 micrometers) for the Odyssey but no sensor model.

What does a smart telescope show, and what does it miss?

BBC Sky at Night Magazine’s guide to the category (Iain Todd, September 14, 2026) defines these instruments by two things: automated pointing, and a camera that keeps stacking frames in an app. The picture on the phone gets cleaner the longer the telescope stays on a target.

That is why they do well on faint galaxies and nebulae. The magazine says they are particularly effective on deep-sky objects and in light pollution. An eyepiece shows only the light arriving at that moment, while the camera keeps adding more.

The same guide lists the limits:

• Planets. Small apertures and short focal lengths make high-resolution planetary imaging hard. Astronomy magazine’s review of the Dwarf 3 (Phil Harrington, August 2025 issue) reached the same verdict for that model.
• No eyepiece. Most models show the sky only on a screen. Vaonis says the Vespera II has “only one button, no eyepiece”. Unistellar lists an eyepiece, developed with Nikon, on the Odyssey Pro only.
• Framing. Many cannot fit a large object such as the Andromeda Galaxy in one frame. Vaonis answers this with a mosaic mode it calls CovalENS, which widens the Vespera II’s field to 4.33 x 2.43 degrees.
• Cost. The magazine names price as a barrier for beginners.

So a smart telescope and an eyepiece telescope are different experiences. One produces a shared picture on a screen after some minutes. The other puts live light from Saturn or the Moon into your eye. If the second is what you are after, compare the NexStar SE and StarSense Explorer telescopes instead.

The six models, one at a time

ZWO Seestar S50

ZWO describes the S50 as a telescope, electric focuser, camera, alt-azimuth mount, dew heater and filter wheel in one 2.5 kg body. Its built-in filters are a UV/IR-cut filter and a duo-band (OIII and H-alpha) filter. The field of view, 0.73 x 1.29 degrees, is the narrowest of the small models here, which suits smaller targets and makes large ones a mosaic job.

ZWO Seestar S30

The S30 trades aperture for width and weight: 30 mm, a 2.46 degree telephoto field and 1.65 kg. It adds a second wide-angle camera with a 23.2 degree field. ZWO estimates about 6 hours of battery in stargazing mode and about 4 hours in scenery or video mode.

Dwarflab Dwarf 3

The Dwarf 3 is the lightest here at 1.3 kg, with two lenses and a Sony IMX678 sensor. BBC Sky at Night Magazine’s review (Sonia Turkington, April 15, 2025) reports a 10,000 mAh battery, 128 GB of storage, built-in filters and an equatorial mode that supports exposures up to 60 seconds. The reviewer noted that no tripod is included and that the wide-angle lens focus cannot be adjusted by hand.

Vaonis Vespera II

This comparison uses the Vespera II, not the Vespera Pro or later models. Vaonis lists a 50 mm quadruplet apochromat, a Sony IMX585 sensor at 3840 x 2160 pixels and a 2.5 x 1.4 degree native field. It weighs 5 kg and its stated battery life, 4 hours, is the shortest in the table.

Unistellar Odyssey

Unistellar lists an 85 mm mirror, a 320 mm focal length and a weight of 4 kg. The maker says no focus or collimation adjustment is needed, and gives a limiting magnitude of 17.2. Its field, 33.6 x 45 arcminutes, is a little over half a degree on the short side, so it is the most zoomed-in of the portable models.

Celestron Origin Mark II

The Origin is a different scale of instrument: a 152 mm f/2.2 Rowe-Ackermann Schmidt Astrograph on a GoTo mount and tripod, 41.6 lb in total. Celestron says it aligns itself with StarSense technology in under two minutes, and that built-in algorithms stack and process each frame. It has a filter drawer for 1.25 inch or 2 inch filters and an automated dew heater. Celestron calls it a home observatory, and the weight matches that description.

Smart telescopes on eBay: Seestar, Dwarf, Vespera, Unistellar and Origin

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Browse current smart telescopes on eBay.

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• ZWO Seestar S50Shop on eBay →
• ZWO Seestar S30Shop on eBay →
• Dwarflab Dwarf 3Shop on eBay →
• Vaonis VesperaShop on eBay →
• UnistellarShop on eBay →

How to choose between them

Start with where it will be used. A 1.3 to 2.5 kg unit goes in a day bag; a 41.6 lb system lives near the door to the yard.

Then look at field of view against your targets. Wide fields (Seestar S30, Vespera II) frame large nebulae. Narrow fields (Seestar S50, Odyssey) suit smaller galaxies and clusters.

Battery and storage come last, since every model here lists at least 4 hours.

Where to go from here

A smart telescope is one of three routes into night sky photography. The beginner astrophotography gear guide sets it beside a camera on a star tracker.

Buying one as a present? The stargazing gifts guide matches gear to the person. For binoculars, first telescopes and everything else, return to the stargazing gear overview.