These two are not competitors, and the honest answer is that most people asking the question want the ZWO Seestar S30 at $399 (399 € in Europe). The Vaonis Hestia at 229 € — Vaonis lists no US price, and sells it in packs from 189 € to 299 € — is a passive optical module with no motor, no tracking and no sensor of its own. Your phone is the camera and your hand is the mount.
The 20-second verdict
The ZWO Seestar S30 is a motorised smart telescope: it finds targets, tracks them, stacks exposures over minutes and hours, and writes 2.1 MP results to 64 GB of onboard storage. The Vaonis Hestia is a 30 mm optical block that redirects light into a smartphone camera. It has no electronics at all, so it cannot track, cannot stack, and cannot follow an object as the Earth turns. Winner as a telescope: the S30, without qualification.
That does not make the Hestia a bad object. It is 0.85 kg, needs no battery, costs less than half as much, and gives an immediate, tactile, solar-and-lunar experience that a sealed robot does not. It is a very good gift and a very good introduction for a child. But if the words you used were “smart telescope”, the answer is the S30 for roughly 100 € more than a fully loaded Hestia pack. Winner overall: the S30.
Side by side
| Spec | Vaonis Hestia | ZWO Seestar S30 |
|---|---|---|
| Indicative price | 229 € (packs from 189 € to 299 €; no US list price) | $399 (399 € in Europe) |
| Aperture | 30 mm | 30 mm |
| Focal length | Not specified | 150 mm |
| Focal ratio | Not specified | f/5 |
| Sensor | Your smartphone camera | Sony IMX662 (Starvis 2) |
| Resolution | Whatever your phone records | 2.1 MP |
| Field of view | 1.8° | 1.20° × 2.13° |
| Motorisation and tracking | None — you point it by hand | Motorised go-to and tracking |
| Equatorial mode | No — no motorisation | Yes — optional TH10 head |
| Built-in filters | No — solar filter depending on pack | UV/IR-cut + Hα/OIII dual-band + dark · solar filter included |
| Mosaic | No | Yes |
| Battery life | None needed — no electronics | 6 h |
| Storage | Your smartphone | 64 GB (eMMC) |
| Weight | 0.85 kg | 1.65 kg |
| Tripod included | Depending on pack | Yes — carbon fibre |
What actually separates them
Category, not specification
Start here, because the spec table is misleading if you skim it. Both list a 30 mm aperture, which invites the conclusion that they are similar instruments. They are not. The S30 is an autonomous imaging system; the Hestia is an accessory that turns a phone into a small refractor. Comparing their apertures is like comparing the lens diameter of a camera and a magnifying glass. Winner: not applicable — these are different products, and choosing between them is choosing between activities.
Tracking and what it makes possible
This is the entire difference. The S30 has motorised go-to and tracking, which means it can hold a target while it accumulates signal, and an optional TH10 equatorial head for longer exposures. Deep-sky imaging is fundamentally the act of collecting light over time on a stationary target, and without tracking that act is impossible. The Hestia has no motorisation, so faint galaxies and nebulae are permanently out of reach. Not difficult: out of reach. Winner: the S30, and it decides the page.
Sensor, filters and image quality
The S30 uses a Sony IMX662 Starvis 2 at 2.1 MP with three filter positions including an Hα/OIII dual-band, plus a solar filter in the box. The Hestia uses whatever camera is in your phone, with a solar filter included only on certain packs. Phone sensors are genuinely good in daylight and on the Moon; they are not designed for long integrations on faint objects, and without tracking they will never get the chance. Winner: the S30.
Weight, price and what you are really buying
The Hestia takes weight at 0.85 kg against 1.65 kg, needs no charging, and has nothing to fail. Its Essential pack starts at 189 €, with Solar at 259 € and Ultimate at 299 €, and the tripod depends on which pack you choose — check that before ordering. The S30 at $399 includes a carbon tripod and everything else. So the real price gap between a fully specified Hestia and an S30 is around 100 €, not the 170 € the headline figures suggest. That is a small premium for motorisation. Winner: the S30 on value, the Hestia on simplicity.
Which one for your use case
For deep-sky imaging
The S30, and only the S30. The Hestia cannot track, so nebulae and galaxies are not on its menu at any exposure length. Do not buy the Hestia hoping to photograph the Orion Nebula. Winner: the S30.
For the Sun and the Moon
The Hestia is a genuine contender here, which is the one part of this comparison that is close. Bright targets need no tracking to be enjoyable, a phone sensor handles them well, and the Solar and Ultimate packs include the filter. The S30 also includes a solar filter and will do the job automatically. Winner: the Hestia on experience, the S30 on results.
For a child
The Hestia. Nothing to break, nothing to charge, nothing to update, and the child physically aims it, which is most of the appeal at that age. Our picks for kids cover this in more depth. Winner: the Hestia.
For a first real telescope
The S30. It is the cheapest complete motorised package available, tripod included, and it will still be useful in three years. See our beginner picks for the alternatives at this price. Winner: the S30.
For travel and minimal kit
The Hestia, narrowly. At 0.85 kg with no battery to charge and no firmware to worry about, it is the easier thing to throw in a bag. But you are travelling with an optical toy rather than a telescope, so be clear about what you are packing. Winner: the Hestia.
Frequently asked questions
Can the Hestia photograph nebulae and galaxies?
No. It has no motorisation and therefore no tracking, so it cannot hold a faint target while light accumulates. It is designed for the Moon, the Sun with the appropriate filter, and bright terrestrial views.
What does the Hestia cost in dollars?
Vaonis does not publish a US list price in our data. In Europe it is quoted at 229 €, with an Essential pack at 189 €, a Solar pack at 259 € and an Ultimate pack at 299 €. Compare the fully loaded pack, not the entry figure.
Is the Hestia’s 30 mm aperture equivalent to the S30’s?
The number is the same and the meaning is not. The S30 puts its 30 mm in front of a dedicated Starvis 2 sensor on a tracking mount; the Hestia puts its 30 mm in front of your phone on a static tripod. The optic is the least important part of the difference.
Does the Hestia come with a tripod?
It depends on the pack, which is a detail worth confirming at checkout. The S30 includes a carbon-fibre tripod as standard, and so does the ZWO Seestar S30 Pro.
If I want the cheapest motorised option, what should I look at?
The S30 at $399 and the DwarfLab Dwarf mini at $419 are the two entry points, with the caveat that DwarfLab supplies no tripod. Work through all comparisons before deciding.