Buy the Vaonis Vespera II at $1,590 (1,590 € in Europe) unless you specifically need to shoot all night unattended; buy the Vaonis Vespera III at $2,490 (2,490 € in Europe) only if you do. Same 50 mm aperture, same Sony IMX585, same 8.3 MP, same field: the $900 gap buys endurance and storage, not better images.
The 20-second verdict
Read the spec table before you read anything else. The Vaonis Vespera II and the Vaonis Vespera III share an aperture, a sensor, a definition, a field of view, a mosaic field and a weight. On a given target, in a given hour, they will produce the same picture. Anyone who tells you the III resolves more is selling something.
What changes is how long the machine keeps working: 11 hours of battery against 4, and 115 GB of storage against 25. That is a genuine functional gain for anyone doing long unattended integrations, and it is worth $900 to a narrow group of people. For everyone else the Vespera II is the same telescope for 36 percent less. Winner overall: the Vespera II. One reserve on the III: we have found no published independent test of it, so its real-world behaviour rests on manufacturer figures for now.
Side by side
| Spec | Vaonis Vespera II | Vaonis Vespera III |
|---|---|---|
| Indicative price | $1,590 (1,590 € in Europe) | $2,490 (2,490 € in Europe) |
| Aperture | 50 mm | 50 mm |
| Focal length | 250 mm | 245 mm |
| Focal ratio | f/5 | f/4.9 |
| Sensor | Sony IMX585 | Sony IMX585 |
| Resolution | 8.3 MP | 8.3 MP |
| Field of view | 2.5° × 1.4° | 2.5° × 1.4° |
| Mosaic field | 4.33° × 2.43° | 4.33° × 2.43° |
| Equatorial mode | No — alt-azimuth | No — alt-azimuth |
| Built-in filters | No — solar, dual-band and CLS optional | No — solar, dual-band and CLS optional |
| Mosaic | Yes — CovalENS, 24 MP | Yes — CovalENS, 24 MP |
| Battery life | 4 h | 11 h |
| Storage | 25 GB (eMMC) | 115 GB (eMMC) |
| Weight | 5.0 kg | 5.0 kg |
| Tripod included | Yes | Yes |
What actually separates them
Optics and light gathering
Identical, to within a manufacturing tolerance. Both use a 50 mm apochromatic objective. Focal length moves from 250 mm to 245 mm and the focal ratio from f/5 to f/4.9, which is a 2 percent change and invisible in practice. Light grasp, resolving power and plate scale are the same on both instruments. If your reason for considering the III is image quality, stop here and save the $900. Winner: a draw, and not a close-run one.
Sensor, resolution and field
Also identical, and unusually so for a generational step. Both carry the Sony IMX585 at 8.3 MP, both frame 2.5° × 1.4°, and both stitch CovalENS mosaics out to 4.33° × 2.43° at 24 MP. Vaonis did not change the imaging chain between these two models. The consequence is worth stating bluntly: every framing decision, every crop, every mosaic you can build on a III you can build on a II. Winner: a draw.
Endurance and storage
Here is the whole case for the III, and it is a real one. Four hours is a short winter session; eleven hours is a full summer night at mid latitude with margin left over. If you set the telescope down at dusk and collect it at dawn, that difference decides whether you are integrating or babysitting a power bank. Storage follows the same logic: 25 GB fills quickly at 8.3 MP, while 115 GB lets a multi-night project accumulate without offloading. Winner: the Vespera III, clearly.
Filters, portability and real cost
Neither model has built-in filters. Solar, dual-band and CLS filters are optional accessories on both, which means the light-pollution answer costs the same extra money whichever you buy — a point worth remembering when comparing them against instruments that include filters in the box. Weight is 5.0 kg on both, tripod included on both, so there is no portability argument in either direction. Real cost is $1,590 against $2,490 plus the same accessory list. Winner: the Vespera II.
Which one for your use case
For a first serious smart telescope
The Vespera II. It is the cheaper route to identical images, and a 2024 model with a track record beats a 2026 model without published independent testing when you are spending your first four figures. Winner: the Vespera II.
For all-night unattended sessions
The Vespera III, without hesitation. Eleven hours and 115 GB are exactly the specification for leaving a telescope running from dusk to dawn on one target. This is the one use case that justifies the price. Winner: the Vespera III.
For large nebulae and mosaics
A draw on capability, so let price decide. CovalENS gives both the same 4.33° × 2.43° stitched field at 24 MP, which is genuinely wide and one of the better arguments for Vaonis in general. The III will get through a big mosaic in fewer sessions only because it can stay out longer. Winner: the Vespera II on value.
For city skies
A draw, and a qualified one. Neither ships a dual-band filter, so both need the same optional accessory before emission nebulae come through suburban skyglow, and the 50 mm aperture behind it is the same. If light pollution is your main constraint, our picks for light-polluted skies are a better starting point than either of these. Winner: a draw.
For travel
The Vespera III, narrowly. Identical 5.0 kg and identical tripod mean the same suitcase problem either way, but 115 GB and 11 hours mean fewer charging stops and no laptop needed to clear storage mid-trip. Winner: the Vespera III.
Frequently asked questions
Does the Vespera III take better pictures than the Vespera II?
No, not from the hardware. Same 50 mm aperture, same Sony IMX585, same 8.3 MP, same 2.5° × 1.4° field. The III can integrate for longer in one sitting, which improves signal on a given night, but the per-hour image is the same.
Is the $900 difference justified?
Only if you shoot unattended for more than four hours at a stretch. Eleven hours of battery and 115 GB of storage are worth real money to a dusk-to-dawn imager and worth nothing to someone who observes for two hours after dinner.
Do either of them have built-in filters?
Neither does. Vaonis sells solar, dual-band and CLS filters as accessories for both, so budget the same extra either way. This is a real difference from ZWO and DwarfLab models, which include filters.
What about the Vespera Pro 2 and the Stellina?
The Vaonis Vespera Pro 2 sits above both at $2,990, but like the III it has no published independent test yet. The Vaonis Stellina is discontinued and should not be a new purchase.
Which should I buy if I want the most telescope per dollar?
Neither, strictly. At 50 mm both are expensive per millimetre of aperture next to the competition. Check all comparisons and our best smart telescopes for deep sky before committing.