Omegon 2x ED 2″ Barlow Lens

Omegon 2x ED Barlow lens 2″

Looking for a way to double the magnification of your favourite eyepieces without giving up image quality? The Omegon 2x ED Barlow lens in 2″ format is exactly what you need. It is designed for use with higher-class telescopes equipped with a 2″ focuser, and thanks to its special ED glass optics it delivers results that every experienced observer will appreciate.

ED glass - minimal chromatic aberration

At the heart of this Barlow lens is optics made from ED glass (Extra-low Dispersion) - glass with exceptionally low dispersion. What does that mean in practice? The refractive index of ED glass is only minimally dependent on the frequency of light passing through it. Different wavelengths are bent in almost the same way, so they do not split into rainbow-coloured fringes around planetary details or star disks. The result is residual chromatic aberration reduced to an absolute minimum. The image stays natural, sharp and full of fine details that ordinary optical elements would simply blur into coloured fringes.

This approach is well known from apochromatic refractors and ED binoculars. Omegon now brings it directly into a Barlow lens, so you benefit from ED optics regardless of whether you use a refractor, a reflector or a catadioptric system.

Multicoating for better contrast and brightness

All optical surfaces of the lens are treated with a multi-layer anti-reflection coating (multicoating). This significantly reduces stray reflections and light scatter, which would otherwise lower image contrast and cause unwanted glare or ghost images when observing bright objects - the Moon, planets or star clusters near the edge of the field of view. More light reaches the observer's eye directly, the image appears brighter and contrast improves. This is especially valuable at high magnifications, where every photon matters.

Compatibility and practical use

Thanks to its 2″ format, the Omegon 2x ED Barlow lens is compatible with a wide range of 2″ eyepieces. With a standard reduction sleeve it also works with 1.25″ eyepieces. The 2x magnification factor means that the effective focal length of the telescope doubles - for example, a 10 mm eyepiece becomes the equivalent of a 5 mm eyepiece. This is ideal for detailed observation of:

• The Moon
• Planets
• Close double stars

Best results are achieved under good atmospheric stability (good seeing).

No vignetting even with wide-field eyepieces

The solid mechanical construction and the 2″ diameter ensure that the lens does not cause vignetting even when used with wide-angle eyepieces that have a large exit lens. This is a real risk with cheaper 1.25″ Barlow lenses used with similar eyepieces. For owners of premium 2″ wide-field eyepieces, choosing this format is the logical and practical decision.

Quality and value

Omegon is a brand that has long appealed to astronomers looking for a balanced ratio of build quality to price. In this Barlow lens that balance shows in the choice of ED optics and quality multicoating - features that are standard only in significantly more expensive competing products. If you own a quality apochromat or any other high-performance telescope and do not want to compromise its performance with cheap add-on optics, the Omegon 2x ED Barlow lens 2″ is a natural choice that will do justice to your equipment.

Technical specifications