Omegon Tritron Pro 1.25″ binocular viewer
Observing the night sky with both eyes is an experience that simply cannot be compared to looking through a single eyepiece. The Omegon Tritron Pro 1.25″ binocular viewer brings you exactly that comfort - a more natural perception of the image, reduced eye fatigue during long observing sessions, and a noticeably deeper sense of depth when viewing the Moon, planets or bright deep-sky objects. The Tritron Pro has been designed with a focus on optical quality and practical usability, catering to a wide range of users from enthusiastic beginners to experienced observers.
Optics and coatings
The optical system of the viewer consists of 7 lenses arranged in 5 groups - a solid configuration that ensures a clean and high-contrast image transfer without unnecessary aberrations. A key feature is the dielectric coating on all optical surfaces, achieving a surface reflectivity of 99%. In practice, this means minimal light loss and maximum brightness transfer to the eyepiece - an important factor especially when observing faint objects or when used with slower telescopes. The magnification factor of the viewer is 1x, so there is no change in effective focal length and no image darkening caused by the additional optical element.
Image correction and compatibility
The viewer provides full image correction - both vertically and horizontally. The image is therefore correctly oriented, which is appreciated not only in astronomical use but also for occasional terrestrial observations. The light beam diameter is 17.4 mm, which corresponds to the standard for the 1.25″ class and fully utilises most eyepieces in this format. A filter thread is integrated into the viewer, so standard astronomical filters can be used directly without any adapters.
The viewer is compatible with all 1.25″ eyepieces with a field stop of up to 22 mm, and the connection to the telescope is also a standard 1.25″ insertion. The interpupillary distance (IPD) is continuously adjustable in the range of 58 to 74 mm, covering the vast majority of users regardless of facial anatomy. Included with the viewer is a ring clamp for safe and firm attachment in the telescope focuser - this element eliminates any concerns about unintentional slipping during use.
Build quality and dimensions
The viewer is built in a compact form factor and is finished in a matte black housing that prevents unwanted reflections in the dark - the standard for quality astronomical accessories. When planning balance for your mount, particularly lighter alt-azimuth systems, it is worth accounting for the weight of the unit. A transport case is included in the package to protect the viewer during transport to an observing site or during storage.
| Parameter |
Value |
| Optical design |
7 elements in 5 groups |
| Coatings |
Dielectric, 99% reflectivity |
| Magnification factor |
1x |
| Image correction |
Full (vertical and horizontal) |
| Light beam diameter |
17.4 mm |
| Eyepiece barrel size |
1.25″ |
| Maximum field stop |
22 mm |
| Telescope connection |
1.25″ insertion |
| Interpupillary distance (IPD) |
58 - 74 mm |
| Dimensions |
12.7 x 10.6 x 5 cm |
| Weight |
710 g |
| Included accessories |
Ring clamp, transport case |
Why choose the Omegon Tritron Pro?
Omegon is a brand with a long-standing tradition in astronomical optics, built on the combination of accessibility and genuine optical quality. The Tritron Pro binocular viewer is a good example of this approach - dielectric coatings with 99% reflectivity, complete image correction and a solid 7/5 optical configuration are parameters that usually appear in significantly more expensive products. The careful construction, practical additions such as the ring clamp and the included carry case, and very broad compatibility with 1.25″ eyepieces make it a choice you will not regret - whether you are at the eyepiece regularly or only occasionally.
Key advantages at a glance
- Natural two-eyed observation - reduced eye fatigue and enhanced depth perception
- 99% dielectric coatings on all optical surfaces - minimal light loss
- 1x magnification factor - no change to effective focal length or image brightness
- Full image correction vertically and horizontally
- Compatible with all standard 1.25″ eyepieces and astronomical filters
- Adjustable IPD from 58 to 74 mm
- Includes ring clamp and protective transport case
