Celestron Origin

€5,299 for 152 mm of aperture at f/2.2: two years after its release, the first-generation Origin is still the smart telescope that gathers the most light on the consumer market. It weighs 18.87 kg, cannot do planetary, and its replacement changes nothing but the camera.

The verdict in three lines

The Origin is not a travel telescope in disguise: it is a backyard observatory. Where a Seestar fits in a backpack, this one needs a car boot and both hands. In exchange, its 152 mm Schmidt RASA astrograph at f/2.2 plays in a category no consumer rival follows it into — the largest aperture in the segment, paired with the fastest focal ratio.

The catch is that part of that aperture is eaten by the central obstruction: the camera sits at prime focus, right in the middle of the beam, blocking 63 mm, or 41% of the diameter. The real gain over a 50 mm instrument is therefore not the ×9 you sometimes read, but more like ×7 to ×8 — which is still considerable.

Since the Mark II arrived, the first generation has been discounted. As the two models share exactly the same optics, the same mount, the same battery and the same software, it is now the cheapest way into 152 mm of automated aperture.

The Origin is for you if…

• You observe from home, always from the same spot. 18.87 kg split between a 4.8 kg tube, a 7.7 kg mount and a 6.35 kg tripod: the instrument assembles without tools in about twenty minutes, then happily goes out and comes back in. It was not designed for hiking.
• You want light, not pixels. At 6.44 MP, the Origin is the least detailed in its price bracket. But in light collection it crushes everything: roughly seven times a 50 mm, five times a 62 mm, once obstruction is accounted for. On faint objects, aperture decides, not resolution.
• You use your own filters. The drawer takes off-the-shelf 1.25″ or 2″ filters, which is rare: most rivals impose proprietary or permanently fitted filters. Be warned, no filter is supplied in the box.
• You process your own images. Full access to the FITS files by USB stick, over Wi-Fi or by anonymous FTP, raw sequence and stacked result included. No subscription, no lock-in. The OneSky community platform is free.
• You run a club or a classroom. This is the use case testers recommend most often: up and running in one to two minutes, reliable automatic alignment, and a screen that fills fast enough to hold a group’s attention.

Avoid it if…

• You are hoping to see Saturn. At 335 mm of focal length, the Origin is structurally incapable of planetary work. Two reviewers, at Space.com and Live Science, report failing to achieve focus on Saturn, neither automatically nor manually, in otherwise ideal conditions.
• You want a quiet instrument. Cloudy Nights describes the motors as “among the loudest in the entire Celestron range”. In a housing estate, that matters.
• You shoot on warm nights. The sensor is not cooled, and hot pixels show up on long exposures. At this price point, it is the most frequently voiced complaint.
• You want maximum resolution. 6.44 MP against 12.5 MP for a Vespera Pro 2 at €2,990. The Origin’s sensor is so small, 8.86 mm diagonal, that it uses only a fraction of the flat field the RASA is capable of correcting.
• Budget is your deciding criterion. The debate that comes up most often on the forums is this one: a Seestar S50 at €549 covers a good share of the same uses. The Origin only makes sense if aperture genuinely matters to you.

What it is really worth in the field

Deep sky

This is where the Origin earns its keep. 152 mm of aperture at f/2.2 reaches, in a few minutes, a signal-to-noise ratio that a 50 mm instrument takes an hour to build — the order of magnitude follows from the collecting-area calculation, no quantified comparative test having been published to date. Astronomy.com describes the StarSense automatic alignment as “flawless” across all of its sessions. Worth noting: several reviewers observe that the instrument behaves well in light-polluted areas, which was not a given with an uncooled sensor.

The downside comes from the onboard processing. Cloudy Nights criticises the denoising AI for “sacrificing detail” and the deconvolution for overcooking globular clusters. This is fixable: the raw files remain accessible and usable, and a community stacking tool is even freely available.

Moon and Sun

The 1.27° × 0.85° field frames the whole Moon with plenty of room to spare, but the short focal length allows no fine detail. A SnapShot mode exists for daytime and terrestrial imaging, with one documented limitation: with no star visible, autofocus does not work and focusing has to be done by hand.

Planets

Let us be blunt: the Origin does not do planetary. 335 mm of focal length on a 2.4 µm sensor gives an image of Jupiter a few dozen pixels across. This is not a setting to be found, it is a physical limit. If planets interest you, this is not the instrument you need.

The software: a product that has matured

An important point for anyone buying in 2026 rather than 2024. Celestron’s own release notes document serious flaws at launch: autofocus hanging indefinitely, intermittent corruption of the stacking, plate-solving crashes, recurring Wi-Fi problems. All fixed since. Better still: equatorial mode and StarSense autoguider support arrived after purchase, free of charge, on first-generation hardware. Today’s buyer inherits software stabilised by two years of patches — that is an argument in its favour, not against it.

The Origin against its direct rivals

Origin versus Celestron Origin Mark II

The most useful comparison, since the two are sold alongside each other. Only the camera changes: the 6.44 MP IMX178LQJ gives way to an 8.3 MP IMX678 Starvis 2, sampling goes from 1.48 to 1.23 arcseconds per pixel and the field becomes 1.32° × 0.75°, wider but shorter. Tube, mount, battery, dew control, filter drawer and app are identical — BBC Sky at Night and Space.com both confirm it.

Under a French sky where seeing routinely exceeds 2 arcseconds, sampling at 1.48″/px is already finer than what the atmosphere lets through on most nights. The Mark II’s resolution gain is therefore largely theoretical in practice. At €700 apart, the discounted first generation is the more rational buy of the two — all the more so since the camera can be upgraded later.

Origin versus Vaonis Vespera Pro 2

Two opposing philosophies. The Vespera Pro 2 at €2,990 offers twice the resolution, 5 kg all in, a carbon tripod and dew control included, and 11 hours of battery life. The Origin offers nine times its raw collecting area. If you print large and you travel, buy the Vaonis. If you hunt faint objects from a fixed spot, the Origin pulls ahead night after night.

Origin versus Unistellar Odyssey Pro

The Odyssey Pro, 85 mm at f/3.9 and 6.5 kg, sits between the two: more portable than the Origin, far brighter than a 50 mm. Its 4.1 MP sensor is, however, the most modest of the three, and the Unistellar ecosystem is the most closed on the market. The Origin stays ahead on light collection and on processing freedom.

Alternatives by budget

• Under €1,000 — the ZWO Seestar S50 Pro at €999 covers, according to reviewers, a significant share of the Origin’s uses for a fifth of the price and 2.8 kg. That is the trade-off to weigh honestly before spending five times as much.
• Around €2,500 to €3,000 — the Vaonis Vespera III or the Vespera Pro 2, if portability and resolution outweigh aperture.
• Above €5,000 — the Origin Mark II, for the Starvis 2 sensor, or a genuine modular setup of mount plus tube plus cooled camera, more demanding but with no ceiling.

Frequently asked questions

Has the first-generation Origin been independently tested?

Yes, extensively, unlike many products in this category. Space.com and Live Science tested it in September 2024, Astronomy.com in December 2024, and Cloudy Nights published a very detailed user review in February 2025. We did not, on the other hand, find any review published in French.

What is the difference with the Mark II, in concrete terms?

The camera, and nothing else. 8.3 MP instead of 6.44, sampling of 1.23″/px instead of 1.48, a field slightly wider but shorter. The optics, the mount, the battery and the app are identical. Celestron also offers a camera upgrade for first-generation owners.

Is a subscription required?

No. No subscription, no paid features, and the OneSky sharing platform is free. It is a clear point of differentiation against the Unistellar ecosystem.

Can you retrieve the raw files?

Yes, without restriction, in FITS format, by USB stick, Wi-Fi download or anonymous FTP. The full sequence and the stacked result are both transferred, about 12 MB per image. One known trap, undocumented in the manual: the raw files are flipped while the on-screen display is corrected.

Does the Origin do equatorial mode and mosaics?

Equatorial mode was added free of charge by update, with support for the StarSense autoguider; the equatorial wedge and the autoguider are sold separately. Mosaics shipped in a later update, shown publicly in 2026. As Celestron’s release notes do not explicitly distinguish between the two generations, we have not been able to formally confirm that mosaics are active on the first generation.

Is the claimed 6-hour battery life realistic?

The 97.9 Wh LiFePO4 battery is rated by Celestron at more than 6 hours. One long-term user reports closer to 60 to 90 minutes of active imaging, but that account is isolated and we found no other source to corroborate it. We report it without endorsing it.