Omegon 2x Premium APO 2″ Barlow lens
If you are looking for a way to get the most out of your telescope and existing eyepiece set without compromising on image quality, the Omegon 2x Premium APO 2″ apochromatic Barlow lens is exactly the right solution. This multiplier doubles your telescope's focal length while effectively suppressing secondary chromatic aberration - the persistent flaw that affects standard Barlow lenses - thanks to low-dispersion ED glass elements. The result is a sharp, high-contrast and colour-accurate image, whether you are observing planets, the Moon, or photographing the night sky.
Telecentric 4-element optical design
At the heart of this multiplier is a special telecentric optical system composed of four lens elements. Unlike simpler two- or three-element designs, the telecentric layout ensures uniform sharpness across the entire field of view - from centre to edge. This is a critical advantage in astrophotography, where any softening in the corners of an image is immediately noticeable. The four optical elements also allow better correction of spherical aberration and coma, so point light sources such as stars remain genuinely point-like even at the edges of the frame.
Apochromatic correction with ED glass and FMC coatings
The use of low-dispersion ED glass in an apochromatic arrangement ensures that secondary chromatic aberration - that unwanted violet or green fringing around bright objects - is reduced to a minimum. All optical surfaces are treated with FMC (fully multi-coated) anti-reflection coatings, which maximise light transmission and minimise stray reflections and ghost images. For astrophotographers this means a cleaner histogram and less work in post-processing; for visual observers it means rich colours and high contrast throughout the session.
Greater comfort when using long eye relief eyepieces
One of the less discussed but highly appreciated benefits of using a Barlow lens is the ability to pair it with longer focal length eyepieces that offer a larger exit pupil. Instead of short eyepieces with uncomfortably short eye relief, you can reach for comfortable oculars with 15-20 mm or more of eye relief and still achieve the same or greater magnification. This is particularly appreciated by eyeglass wearers. The Omegon Premium APO 2″ Barlow lens is designed for the standard 2″ format, making it compatible with all common eyepieces of this size.
Who is this Barlow lens for?
- Visual observers who want to push their telescope to its limits on planetary detail
- Astrophotographers looking for a reliable focal length multiplier for detailed images of the Moon and planets
- Eyeglass wearers who need the comfort of long eye relief eyepieces
- Anyone wanting to expand their magnification range without purchasing additional short-focal-length eyepieces
Key features at a glance
| Parameter |
Value |
| Magnification factor |
2x |
| Barrel diameter |
2″ (50.8 mm) |
| Optical design |
Telecentric, 4 elements |
| Glass type |
ED (low-dispersion) |
| Chromatic correction |
Apochromatic (APO) |
| Surface coatings |
FMC (fully multi-coated) |
| Suitable for |
Visual observation, astrophotography |
About Omegon Premium APO series
Omegon is a brand with a long-standing tradition in the world of astronomical optics, combining accessible pricing with a strong emphasis on optical quality that meets the demanding expectations of amateur astronomers. The Premium APO range represents the top of Omegon's Barlow lens lineup - the telecentric four-element design, apochromatic correction and FMC surfaces are attributes more typically found in premium products at significantly higher prices. Whether you are a visual observer determined to extract every detail from your telescope on planetary targets, or an astrophotographer seeking a dependable multiplier for high-resolution lunar and planetary imaging, this Barlow lens will deliver results you will be proud of.
