A sealed tube, a lens at the front, and colour to account for · review
An 80/900 refractor on an alt-azimuth head with setting scales, supplied with two wide-angle eyepieces, an erecting diagonal, a phone adapter and a carry bag.
The bottom line The long-focal-length choice of this group, with the tripod rather than the objective as the part to watch.
Eighty millimetres of aperture against nine hundred millimetres of focal length gives f/11.3. That matters in two ways: simple eyepieces behave better at long ratios, and the same eyepiece gives more magnification here than in a shorter tube. The trade is framing — a wide star field will not fit.
The maker describes altitude and azimuth scales on the mount. They do not make it a GoTo, and they do make it possible to write down where something was and come back to it, which is the beginning of an observing routine.
They are 900 divided by 20 and by 10 — the two supplied eyepieces. They describe eyepieces. The two figures that describe this telescope are its aperture and its focal length, and they are at the top of this page.
Tripod damping. A 900 mm tube is a lever, and how long the view shakes after a touch decides how usable high magnification is. No figure is published for it, and this page will not estimate one.
German, French, Italian and Spanish Amazon stores ran from 150 € to 160 € on the day of the survey.
American and British Amazon stores list it in local currency, which the euro range above sets aside.
Figures as Keepa reported them on the day this page was last updated. Stock and pricing shift without warning.
Prices quoted in this text were read on 17 September 2026. The live price is at the top of the page.
| Aperture | 80 mm (title and bullet agree) |
|---|---|
| Focal length and ratio | 900 mm (from the title) · f/11.3, the quotient of the two figures above |
| Lens design | Refractor, coated objective per the maker’s bullet |
| Glass type | Not published by the maker. |
| Focuser | Not published by the maker. |
| Drawtube | Not published by the maker. |
| Tube weight | Not published by the maker. |
| Supplied accessories | 20 mm and 10 mm wide-angle, per the maker · Erecting diagonal, phone adapter, carry bag |
| Amazon reference | B0CHR81WJ1 (same reference on 6 Amazon marketplaces) |
| EAN | 0727380311808 |
It collects about 30 % more light, which is arithmetic on the two apertures. Whether that shows depends far more on the sky and on the eyepiece than on the difference itself.
It delivers an upright, correctly handed image, which is what makes daytime use comfortable. For the sky, orientation matters only for matching a chart.
70 mm aperture · 400 mm focal length in the title
A 70/400 refractor sold with two eyepieces, a 5x Barlow, a phone adapter and a stainless-steel tripod — and a listing whose own bullets contradict its title.
Best for: A buyer who will check the tube’s printed figures before ordering anything else for it
≈ £79 / €70
70 mm aperture · 400 mm focal length
A 70/400 refractor sold as a first instrument for children from eight, supplied in a backpack with three eyepieces, a star diagonal and an erecting lens.
Best for: A child from about eight who will carry the telescope themselves
≈ £78 / €63
80 mm aperture · 600 mm focal length
An 80/600 refractor on an alt-azimuth head, supplied with two eyepieces, a 5x24 finder, a phone adapter and a backpack.
Best for: A first 80 mm that has to travel in a rucksack
≈ $100 / £70 / €130
