Omegon Oberon 2.5x 2″ Barlow lens
Want to get more from your telescope without buying a whole new set of eyepieces? The Omegon Oberon 2.5x Barlow lens in 2″ format is a technically refined solution that multiplies the magnification of any eyepiece you insert by 2.5x - and it does so without sacrificing image quality.
Four-element optical design for superior correction
Most standard Barlow lenses use a two-element achromatic design. At higher magnifications, this inevitably introduces chromatic aberration - a phenomenon where the lens fails to focus all wavelengths of light to a single point, resulting in colored fringing around bright objects such as planets or the Moon.
The Omegon Oberon 2.5x uses a four-element optical construction that substantially reduces this problem. The result is an image that is sharper, more color-accurate, and visibly brighter - because better aberration correction means more light contributes to a clean, focused image rather than scattering into unwanted artifacts.
Eyepiece retention without scratching
A detail that experienced observers will appreciate: the eyepiece is secured inside the Barlow barrel using a full-circumference clamping ring rather than a traditional set screw. This design distributes clamping force evenly around the entire barrel of the eyepiece, eliminating pressure points that can cause scratches or surface marks on the polished chrome barrels of your eyepieces.
For those who invest in quality accessories, this matters. Your eyepieces stay in perfect condition even after long-term, repeated use.
A practical upgrade for planetary and lunar observation
The Omegon Oberon Barlow lens belongs to a line of accessories that combines accessible pricing with optical quality that satisfies even experienced observers. The Oberon range places particular emphasis on optical performance beyond standard specifications.
If you want to get the most out of your telescope when observing planets, the Moon, or double stars - without investing in an entirely new eyepiece set - a 2.5x Barlow lens in 2″ format is a straightforward and immediately effective way to expand your observing capabilities.
Key features at a glance
- 2.5x magnification factor - compatible with all standard 2″ eyepieces
- Four-element optical design for reduced chromatic aberration
- Full-circumference clamping ring - no set screw, no barrel scratches
- Suitable for planetary, lunar, and double star observation
- Part of the Omegon Oberon accessory range
Technical specifications
| Parameter |
Value |
| Magnification factor |
2.5x |
| Barrel diameter |
2″ (50.8 mm) |
| Optical design |
Four-element |
| Eyepiece retention |
Full-circumference clamping ring |
| Brand / series |
Omegon Oberon |
