Omegon AC 80/400 OTA: the standalone wide-field optical tube for custom setups
The Omegon AC 80/400 OTA is a standalone telescope tube without a mount: 80 mm aperture, 400 mm focal length (f/5), and a weight that any mount can handle. Ideal as a wide-field tube on an existing setup, as a spotting scope, or as a lightweight travel tube on a photo tripod.
The achromatic doublet lens with multi-coating combines two types of glass to reduce chromatic aberration. At high magnification, a thin color fringe remains visible around bright objects; this is characteristic of this type of lens and does not interfere with normal use.
Wide field of view, simple operation
The rack-and-pinion focuser with a 1.25-inch connection accepts any standard eyepiece. With a 20 mm eyepiece, you get 20x magnification and a view of entire constellations; star fields, the full lunar disk, and daytime landscapes are the domain of this tube.
Keep the magnification low: at f/5, an achromat will show color fringing above about 80x. This is deliberately a wide-field instrument.
Mix and match
On an altazimuth mount, a photo tripod with a sturdy head, or as a secondary tube alongside a larger telescope: this OTA is the most affordable starting point for a custom setup.
Included
- Achromatic refractor 80/400 with multicoating (optical tube only)
- Rack and pinion focuser with 1.25-inch connection
Featured accessories
The Omegon Mini II Dobson mount (59 euros) instantly turns it into a complete tabletop telescope, and the Omegon Titania 500 tripod (129 euros) is the standing solution. The Omegon 7-21 mm zoom eyepiece (69 euros) provides continuously variable magnification from 19x to 57x, and an Omegon Premium moon filter (19.90 euros) subdues the bright Moon.
Never look at the sun through a telescope without a certified solar filter: this will cause permanent eye damage within a second.
For whom yes, for whom no
For: DIY builders and travelers looking for a lightweight wide-field optical tube for an existing mount or tripod. Not for: anyone who wants a complete out-of-the-box set; the AC 80/400 AZ-3 is the same optical tube with mount, tripod, and accessories. Compare entry-level models via the Choice assistant. Meer Omegon stands on the merk page.
Specifications
| Feature | Value |
|---|---|
| Opening | 80 mm |
| Focal length | 400 mm |
| Opening ratio | f/5 |
| Optical design | Achromatic refractor |
| Execution | OTA (loose tube, without housing) |
| Focuser | Rack, 1.25 inch |
| Light output | About 130 times more than the naked eye |
Reviews
There are no reviews yet.