Omegon Ritchey-Chretien Pro 154/1370 1:10 OTA - astronomical telescope
If you are looking for a telescope that meets the demands of an experienced observer as well as an ambitious astrophotographer, the Omegon RC Pro 154/1370 is a choice that will not disappoint. This is a true Ritchey-Chretien telescope with a 152mm aperture and a focal length of 1370mm, giving a focal ratio of f/9 - an optical design that has earned a firm place in professional observatories and in the hands of advanced amateurs around the world.
Optical design
The Ritchey-Chretien system is based on two hyperbolic mirrors. This geometry eliminates coma and significantly suppresses astigmatism, delivering an extremely sharp image across the entire field of view - without the need for an additional field corrector. Key optical specifications include:
- Primary mirror diameter: 152mm
- Angular resolution: 0.76 arcseconds
- Maximum useful magnification: 304x
- Limiting stellar magnitude: 12.7 mag
- Light-gathering capacity: 470 times that of the naked eye
The dielectric reflective coating on both mirrors achieves a reflectivity of 92-94%, which directly contributes to the brightness and contrast of the resulting image. The mirrors are made from quartz glass, which is characterised by minimal thermal expansion - the result is stable focus without the need for constant refocusing as the ambient temperature changes. The open-tube design also allows the telescope to reach thermal equilibrium with its surroundings quickly, so the waiting time for the optics to stabilise is significantly shorter compared to closed-tube systems.
Focuser and mechanical construction
The Omegon RC Pro 154/1370 is equipped with a dual-speed Crayford focuser with a 1:10 reduction ratio, allowing fine and precise focusing - an essential feature for astrophotography at high magnification or when using heavy camera systems. The eyepiece holder accepts standard 2″ accessories, so compatibility with a wide range of eyepieces and cameras is not an issue.
The tube is fitted with internal baffles to suppress scattered light, and comes with a standard Vixen-style dovetail bar for easy mounting on a wide range of mounts, including EQ5, HEQ5, and more powerful alt-azimuth platforms.
Who is this telescope for?
The Ritchey-Chretien Pro 154/1370 is designed for advanced astronomers who already have experience operating a telescope and want to take their work to the next level - whether for visual observation of the Moon, planets, double stars, galaxies and nebulae, or for astrophotography with a DSLR or a dedicated astronomy camera.
Thanks to the compact tube dimensions and a weight of just 5.5kg, the telescope is portable and can be supported by a mid-class mount. Physical specifications:
| Parameter |
Value |
| Optical design |
Ritchey-Chretien (RC) |
| Aperture |
152mm |
| Focal length |
1370mm |
| Focal ratio |
f/9 |
| Angular resolution |
0.76 arcseconds |
| Maximum magnification |
304x |
| Limiting magnitude |
12.7 mag |
| Mirror coating reflectivity |
92-94% |
| Mirror material |
Quartz glass |
| Focuser type |
Dual-speed Crayford 1:10 |
| Focuser diameter |
2″ |
| Dovetail bar |
Vixen-style |
| Tube length |
485mm |
| Tube diameter |
191mm |
| Weight |
5.5kg |
| Supplied as |
OTA (optical tube assembly) - mount not included |
Important notes
- This telescope is supplied as an OTA (optical tube assembly) without a mount - the choice of mount is left entirely to you and your requirements.
- Solar observation is only permitted with a suitable solar filter.
Summary
The Omegon RC Pro 154/1370 OTA is a serious instrument for anyone who takes astronomy seriously. The combination of hyperbolic optics, premium coatings, thermally stable quartz glass, and a precision focuser adds up to a telescope that simply works - reliably, accurately, and with results you will see both with your own eyes and in images captured with a camera.
